diff --git a/src/command/club/member/communicationCommand.ts b/src/command/club/member/communicationCommand.ts
index cc80442..1505fae 100644
--- a/src/command/club/member/communicationCommand.ts
+++ b/src/command/club/member/communicationCommand.ts
@@ -9,7 +9,7 @@ export interface CreateCommunicationCommand {
   street: string;
   streetNumber: number;
   streetNumberAddition: string;
-  memberId: number;
+  memberId: string;
   typeId: number;
 }
 
@@ -25,10 +25,10 @@ export interface UpdateCommunicationCommand {
   street: string;
   streetNumber: number;
   streetNumberAddition: string;
-  memberId: number;
+  memberId: string;
 }
 
 export interface DeleteCommunicationCommand {
   id: number;
-  memberId: number;
+  memberId: string;
 }
diff --git a/src/command/club/member/memberAwardCommand.ts b/src/command/club/member/memberAwardCommand.ts
index b9c2458..acb2620 100644
--- a/src/command/club/member/memberAwardCommand.ts
+++ b/src/command/club/member/memberAwardCommand.ts
@@ -2,7 +2,7 @@ export interface CreateMemberAwardCommand {
   given: boolean;
   note?: string;
   date: Date;
-  memberId: number;
+  memberId: string;
   awardId: number;
 }
 
@@ -11,11 +11,11 @@ export interface UpdateMemberAwardCommand {
   given: boolean;
   note?: string;
   date: Date;
-  memberId: number;
+  memberId: string;
   awardId: number;
 }
 
 export interface DeleteMemberAwardCommand {
   id: number;
-  memberId: number;
+  memberId: string;
 }
diff --git a/src/command/club/member/memberCommand.ts b/src/command/club/member/memberCommand.ts
index 90ecee0..f5c03d1 100644
--- a/src/command/club/member/memberCommand.ts
+++ b/src/command/club/member/memberCommand.ts
@@ -8,7 +8,7 @@ export interface CreateMemberCommand {
 }
 
 export interface UpdateMemberCommand {
-  id: number;
+  id: string;
   salutationId: number;
   firstname: string;
   lastname: string;
@@ -18,5 +18,5 @@ export interface UpdateMemberCommand {
 }
 
 export interface DeleteMemberCommand {
-  id: number;
+  id: string;
 }
diff --git a/src/command/club/member/memberExecutivePositionCommand.ts b/src/command/club/member/memberExecutivePositionCommand.ts
index 2fd2578..da25ad3 100644
--- a/src/command/club/member/memberExecutivePositionCommand.ts
+++ b/src/command/club/member/memberExecutivePositionCommand.ts
@@ -2,7 +2,7 @@ export interface CreateMemberExecutivePositionCommand {
   note?: string;
   start: Date;
   end?: Date;
-  memberId: number;
+  memberId: string;
   executivePositionId: number;
 }
 
@@ -11,11 +11,11 @@ export interface UpdateMemberExecutivePositionCommand {
   note?: string;
   start: Date;
   end?: Date;
-  memberId: number;
+  memberId: string;
   executivePositionId: number;
 }
 
 export interface DeleteMemberExecutivePositionCommand {
   id: number;
-  memberId: number;
+  memberId: string;
 }
diff --git a/src/command/club/member/memberQualificationCommand.ts b/src/command/club/member/memberQualificationCommand.ts
index 8c6cb04..76b8920 100644
--- a/src/command/club/member/memberQualificationCommand.ts
+++ b/src/command/club/member/memberQualificationCommand.ts
@@ -1,7 +1,7 @@
 export interface CreateMemberQualificationCommand {
   note?: string;
   start: Date;
-  memberId: number;
+  memberId: string;
   qualificationId: number;
 }
 
@@ -11,11 +11,11 @@ export interface UpdateMemberQualificationCommand {
   start: Date;
   end?: Date;
   terminationReason?: string;
-  memberId: number;
+  memberId: string;
   qualificationId: number;
 }
 
 export interface DeleteMemberQualificationCommand {
   id: number;
-  memberId: number;
+  memberId: string;
 }
diff --git a/src/command/club/member/membershipCommand.ts b/src/command/club/member/membershipCommand.ts
index 9e9ca25..28302ca 100644
--- a/src/command/club/member/membershipCommand.ts
+++ b/src/command/club/member/membershipCommand.ts
@@ -1,6 +1,6 @@
 export interface CreateMembershipCommand {
   start: Date;
-  memberId: number;
+  memberId: string;
   statusId: number;
 }
 
@@ -9,11 +9,11 @@ export interface UpdateMembershipCommand {
   start: Date;
   end?: Date;
   terminationReason?: string;
-  memberId: number;
+  memberId: string;
   statusId: number;
 }
 
 export interface DeleteMembershipCommand {
   id: number;
-  memberId: number;
+  memberId: string;
 }
diff --git a/src/command/club/newsletter/newsletterRecipientsCommand.ts b/src/command/club/newsletter/newsletterRecipientsCommand.ts
index ec69c35..90cb2f7 100644
--- a/src/command/club/newsletter/newsletterRecipientsCommand.ts
+++ b/src/command/club/newsletter/newsletterRecipientsCommand.ts
@@ -1,4 +1,4 @@
 export interface SynchronizeNewsletterRecipientsCommand {
   newsletterId: number;
-  recipients: Array<number>;
+  recipients: Array<string>;
 }
diff --git a/src/command/club/newsletter/newsletterRecipientsCommandHandler.ts b/src/command/club/newsletter/newsletterRecipientsCommandHandler.ts
index 262febc..2be82e0 100644
--- a/src/command/club/newsletter/newsletterRecipientsCommandHandler.ts
+++ b/src/command/club/newsletter/newsletterRecipientsCommandHandler.ts
@@ -42,7 +42,7 @@ export default abstract class NewsletterRecipientsCommandHandler {
   private static async syncPresenceAdd(
     manager: EntityManager,
     newsletterId: number,
-    recipients: Array<number>
+    recipients: Array<string>
   ): Promise<InsertResult> {
     return await manager
       .createQueryBuilder()
@@ -60,7 +60,7 @@ export default abstract class NewsletterRecipientsCommandHandler {
   private static async syncPresenceRemove(
     manager: EntityManager,
     newsletterId: number,
-    recipients: Array<number>
+    recipients: Array<string>
   ): Promise<DeleteResult> {
     return await manager
       .createQueryBuilder()
diff --git a/src/command/club/protocol/protocolPresenceCommand.ts b/src/command/club/protocol/protocolPresenceCommand.ts
index 134aeac..758ba03 100644
--- a/src/command/club/protocol/protocolPresenceCommand.ts
+++ b/src/command/club/protocol/protocolPresenceCommand.ts
@@ -4,7 +4,7 @@ export interface SynchronizeProtocolPresenceCommand {
 }
 
 export interface ProtocolPresenceCommand {
-  memberId: number;
+  memberId: string;
   absent: boolean;
   excused: boolean;
 }
diff --git a/src/command/refreshCommand.ts b/src/command/refreshCommand.ts
index 80b14cc..0aa0896 100644
--- a/src/command/refreshCommand.ts
+++ b/src/command/refreshCommand.ts
@@ -1,9 +1,9 @@
 export interface CreateRefreshCommand {
-  userId: number;
+  userId: string;
   isFromPwa?: boolean;
 }
 
 export interface DeleteRefreshCommand {
   token: string;
-  userId: number;
+  userId: string;
 }
diff --git a/src/command/user/user/userCommand.ts b/src/command/user/user/userCommand.ts
index cf23bb8..90f9872 100644
--- a/src/command/user/user/userCommand.ts
+++ b/src/command/user/user/userCommand.ts
@@ -8,7 +8,7 @@ export interface CreateUserCommand {
 }
 
 export interface UpdateUserCommand {
-  id: number;
+  id: string;
   mail: string;
   username: string;
   firstname: string;
@@ -16,20 +16,20 @@ export interface UpdateUserCommand {
 }
 
 export interface UpdateUserSecretCommand {
-  id: number;
+  id: string;
   secret: string;
 }
 
 export interface TransferUserOwnerCommand {
-  fromId: number;
-  toId: number;
+  fromId: string;
+  toId: string;
 }
 
 export interface UpdateUserRolesCommand {
-  id: number;
+  id: string;
   roleIds: Array<number>;
 }
 
 export interface DeleteUserCommand {
-  id: number;
+  id: string;
 }
diff --git a/src/command/user/user/userCommandHandler.ts b/src/command/user/user/userCommandHandler.ts
index affab87..50afb2a 100644
--- a/src/command/user/user/userCommandHandler.ts
+++ b/src/command/user/user/userCommandHandler.ts
@@ -16,9 +16,9 @@ export default abstract class UserCommandHandler {
   /**
    * @description create user
    * @param {CreateUserCommand} createUser
-   * @returns {Promise<number>}
+   * @returns {Promise<string>}
    */
-  static async create(createUser: CreateUserCommand): Promise<number> {
+  static async create(createUser: CreateUserCommand): Promise<string> {
     return await dataSource
       .createQueryBuilder()
       .insert()
@@ -109,11 +109,11 @@ export default abstract class UserCommandHandler {
       });
   }
 
-  private static async updateRolesAdd(manager: EntityManager, userId: number, roleId: number): Promise<void> {
+  private static async updateRolesAdd(manager: EntityManager, userId: string, roleId: number): Promise<void> {
     return await manager.createQueryBuilder().relation(user, "roles").of(userId).add(roleId);
   }
 
-  private static async updateRolesRemove(manager: EntityManager, userId: number, roleId: number): Promise<void> {
+  private static async updateRolesRemove(manager: EntityManager, userId: string, roleId: number): Promise<void> {
     return await manager.createQueryBuilder().relation(user, "roles").of(userId).remove(roleId);
   }
 
diff --git a/src/command/user/user/userPermissionCommand.ts b/src/command/user/user/userPermissionCommand.ts
index 47f7594..c7a8ae6 100644
--- a/src/command/user/user/userPermissionCommand.ts
+++ b/src/command/user/user/userPermissionCommand.ts
@@ -2,15 +2,15 @@ import { PermissionString } from "../../../type/permissionTypes";
 
 export interface CreateUserPermissionCommand {
   permission: PermissionString;
-  userId: number;
+  userId: string;
 }
 
 export interface DeleteUserPermissionCommand {
   permission: PermissionString;
-  userId: number;
+  userId: string;
 }
 
 export interface UpdateUserPermissionsCommand {
-  userId: number;
+  userId: string;
   permissions: Array<PermissionString>;
 }
diff --git a/src/command/user/user/userPermissionCommandHandler.ts b/src/command/user/user/userPermissionCommandHandler.ts
index 75c1142..bd6ffc3 100644
--- a/src/command/user/user/userPermissionCommandHandler.ts
+++ b/src/command/user/user/userPermissionCommandHandler.ts
@@ -42,7 +42,7 @@ export default abstract class UserPermissionCommandHandler {
 
   private static async updatePermissionsAdd(
     manager: EntityManager,
-    userId: number,
+    userId: string,
     permissions: Array<PermissionString>
   ): Promise<InsertResult> {
     return await manager
@@ -61,7 +61,7 @@ export default abstract class UserPermissionCommandHandler {
 
   private static async updatePermissionsRemove(
     manager: EntityManager,
-    userId: number,
+    userId: string,
     permissions: Array<PermissionString>
   ): Promise<DeleteResult> {
     return await manager
diff --git a/src/controller/admin/club/memberController.ts b/src/controller/admin/club/memberController.ts
index 42588fd..6758ee6 100644
--- a/src/controller/admin/club/memberController.ts
+++ b/src/controller/admin/club/memberController.ts
@@ -61,10 +61,7 @@ export async function getAllMembers(req: Request, res: Response): Promise<any> {
   let count = parseInt((req.query.count as string) ?? "25");
   let search = (req.query.search as string) ?? "";
   let noLimit = req.query.noLimit === "true";
-  let ids = ((req.query.ids ?? "") as string)
-    .split(",")
-    .filter((i) => i)
-    .map((i) => parseInt(i));
+  let ids = ((req.query.ids ?? "") as string).split(",").filter((i) => i);
 
   let [members, total] = await MemberService.getAll({ offset, count, search, noLimit, ids });
 
@@ -83,7 +80,7 @@ export async function getAllMembers(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function getMemberById(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.id);
+  const memberId = req.params.id;
   let member = await MemberService.getById(memberId);
 
   res.json(MemberFactory.mapToSingle(member));
@@ -96,7 +93,7 @@ export async function getMemberById(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function getMemberStatisticsById(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.id);
+  const memberId = req.params.id;
   let member = await MemberService.getStatisticsById(memberId);
 
   res.json(MemberFactory.mapToMemberStatistic(member));
@@ -109,7 +106,7 @@ export async function getMemberStatisticsById(req: Request, res: Response): Prom
  * @returns {Promise<*>}
  */
 export async function getMembershipsByMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   let memberships = await MembershipService.getAll(memberId);
 
   res.json(MembershipFactory.mapToBase(memberships));
@@ -122,7 +119,7 @@ export async function getMembershipsByMember(req: Request, res: Response): Promi
  * @returns {Promise<*>}
  */
 export async function getMembershipStatisticsById(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   let member = await MembershipService.getStatisticsById(memberId);
 
   res.json(MembershipFactory.mapToBaseStatistics(member));
@@ -135,7 +132,7 @@ export async function getMembershipStatisticsById(req: Request, res: Response):
  * @returns {Promise<*>}
  */
 export async function getMembershipByMemberAndRecord(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.id);
   let membership = await MembershipService.getById(memberId, recordId);
 
@@ -149,7 +146,7 @@ export async function getMembershipByMemberAndRecord(req: Request, res: Response
  * @returns {Promise<*>}
  */
 export async function getAwardsByMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   let awards = await MemberAwardService.getAll(memberId);
 
   res.json(MemberAwardFactory.mapToBase(awards));
@@ -162,7 +159,7 @@ export async function getAwardsByMember(req: Request, res: Response): Promise<an
  * @returns {Promise<*>}
  */
 export async function getAwardByMemberAndRecord(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.id);
   let award = await MemberAwardService.getById(memberId, recordId);
 
@@ -176,7 +173,7 @@ export async function getAwardByMemberAndRecord(req: Request, res: Response): Pr
  * @returns {Promise<*>}
  */
 export async function getQualificationsByMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   let qualifications = await MemberQualificationService.getAll(memberId);
 
   res.json(MemberQualificationFactory.mapToBase(qualifications));
@@ -189,7 +186,7 @@ export async function getQualificationsByMember(req: Request, res: Response): Pr
  * @returns {Promise<*>}
  */
 export async function getQualificationByMemberAndRecord(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.id);
   let qualification = await MemberQualificationService.getById(memberId, recordId);
 
@@ -203,7 +200,7 @@ export async function getQualificationByMemberAndRecord(req: Request, res: Respo
  * @returns {Promise<*>}
  */
 export async function getExecutivePositionsByMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   let positions = await MemberExecutivePositionService.getAll(memberId);
 
   res.json(MemberExecutivePositionFactory.mapToBase(positions));
@@ -216,7 +213,7 @@ export async function getExecutivePositionsByMember(req: Request, res: Response)
  * @returns {Promise<*>}
  */
 export async function getExecutivePositionByMemberAndRecord(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.id);
   let position = await MemberExecutivePositionService.getById(memberId, recordId);
 
@@ -230,7 +227,7 @@ export async function getExecutivePositionByMemberAndRecord(req: Request, res: R
  * @returns {Promise<*>}
  */
 export async function getCommunicationsByMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   let communications = await CommunicationService.getAll(memberId);
 
   res.json(CommunicationFactory.mapToBase(communications));
@@ -243,7 +240,7 @@ export async function getCommunicationsByMember(req: Request, res: Response): Pr
  * @returns {Promise<*>}
  */
 export async function getCommunicationByMemberAndRecord(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.id);
   let communication = await CommunicationService.getById(memberId, recordId);
 
@@ -311,7 +308,7 @@ export async function createMember(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function addMembershipToMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const start = req.body.start;
   const statusId = req.body.statusId;
 
@@ -332,7 +329,7 @@ export async function addMembershipToMember(req: Request, res: Response): Promis
  * @returns {Promise<*>}
  */
 export async function addAwardToMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const given = req.body.given;
   const note = req.body.note;
   const date = req.body.date;
@@ -357,7 +354,7 @@ export async function addAwardToMember(req: Request, res: Response): Promise<any
  * @returns {Promise<*>}
  */
 export async function addQualificationToMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const note = req.body.note;
   const start = req.body.start;
   const qualificationId = req.body.qualificationId;
@@ -380,7 +377,7 @@ export async function addQualificationToMember(req: Request, res: Response): Pro
  * @returns {Promise<*>}
  */
 export async function addExecutivePositionToMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const note = req.body.note;
   const start = req.body.start;
   const end = req.body.end || null;
@@ -405,7 +402,7 @@ export async function addExecutivePositionToMember(req: Request, res: Response):
  * @returns {Promise<*>}
  */
 export async function addCommunicationToMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const preferred = req.body.preferred;
   const isSMSAlarming = req.body.isSMSAlarming;
   const isSendNewsletter = req.body.isNewsletterMain;
@@ -444,7 +441,7 @@ export async function addCommunicationToMember(req: Request, res: Response): Pro
  * @returns {Promise<*>}
  */
 export async function updateMemberById(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.id);
+  const memberId = req.params.id;
   const salutationId = parseInt(req.body.salutationId);
   const firstname = req.body.firstname;
   const lastname = req.body.lastname;
@@ -473,7 +470,7 @@ export async function updateMemberById(req: Request, res: Response): Promise<any
  * @returns {Promise<*>}
  */
 export async function updateMembershipOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
   const start = req.body.start;
   const end = req.body.end || null;
@@ -500,7 +497,7 @@ export async function updateMembershipOfMember(req: Request, res: Response): Pro
  * @returns {Promise<*>}
  */
 export async function updateAwardOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
   const given = req.body.given;
   const note = req.body.note;
@@ -527,7 +524,7 @@ export async function updateAwardOfMember(req: Request, res: Response): Promise<
  * @returns {Promise<*>}
  */
 export async function updateQualificationOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
   const note = req.body.note;
   const start = req.body.start;
@@ -556,7 +553,7 @@ export async function updateQualificationOfMember(req: Request, res: Response):
  * @returns {Promise<*>}
  */
 export async function updateExecutivePositionOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
   const note = req.body.note;
   const start = req.body.start;
@@ -583,7 +580,7 @@ export async function updateExecutivePositionOfMember(req: Request, res: Respons
  * @returns {Promise<*>}
  */
 export async function updateCommunicationOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
   const preferred = req.body.preferred;
   const isSMSAlarming = req.body.isSMSAlarming;
@@ -622,7 +619,7 @@ export async function updateCommunicationOfMember(req: Request, res: Response):
  * @returns {Promise<*>}
  */
 export async function deleteMemberById(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.id);
+  const memberId = req.params.id;
 
   let deleteMember: DeleteMemberCommand = {
     id: memberId,
@@ -639,7 +636,7 @@ export async function deleteMemberById(req: Request, res: Response): Promise<any
  * @returns {Promise<*>}
  */
 export async function deleteMembershipOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
 
   let deleteMembership: DeleteMembershipCommand = {
@@ -658,7 +655,7 @@ export async function deleteMembershipOfMember(req: Request, res: Response): Pro
  * @returns {Promise<*>}
  */
 export async function deleteAwardOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
 
   let deleteMemberAward: DeleteMemberAwardCommand = {
@@ -677,7 +674,7 @@ export async function deleteAwardOfMember(req: Request, res: Response): Promise<
  * @returns {Promise<*>}
  */
 export async function deleteQualificationOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
 
   let deleteMemberQualification: DeleteMemberQualificationCommand = {
@@ -696,7 +693,7 @@ export async function deleteQualificationOfMember(req: Request, res: Response):
  * @returns {Promise<*>}
  */
 export async function deleteExecutivePositionOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
 
   let deleteMemberExecutivePosition: DeleteMemberExecutivePositionCommand = {
@@ -715,7 +712,7 @@ export async function deleteExecutivePositionOfMember(req: Request, res: Respons
  * @returns {Promise<*>}
  */
 export async function deleteCommunicationOfMember(req: Request, res: Response): Promise<any> {
-  const memberId = parseInt(req.params.memberId);
+  const memberId = req.params.memberId;
   const recordId = parseInt(req.params.recordId);
 
   let deleteCommunication: DeleteCommunicationCommand = {
diff --git a/src/controller/admin/club/newsletterController.ts b/src/controller/admin/club/newsletterController.ts
index f63fd5e..eeb25e6 100644
--- a/src/controller/admin/club/newsletterController.ts
+++ b/src/controller/admin/club/newsletterController.ts
@@ -135,7 +135,7 @@ export async function createNewsletterPrintoutPreviewById(req: Request, res: Res
   let newsletterId = parseInt(req.params.newsletterId);
   let newsletter = await NewsletterService.getById(newsletterId);
   let dates = await NewsletterDatesService.getAll(newsletterId);
-  let recipient = await UserService.getById(parseInt(req.userId));
+  let recipient = await UserService.getById(req.userId);
 
   let data = NewsletterHelper.buildData(newsletter, dates);
   data.recipient = {
@@ -241,7 +241,7 @@ export async function createNewsletterMailPreviewById(req: Request, res: Respons
   let newsletterId = parseInt(req.params.newsletterId);
   let newsletter = await NewsletterService.getById(newsletterId);
   let dates = await NewsletterDatesService.getAll(newsletterId);
-  let recipient = await UserService.getById(parseInt(req.userId));
+  let recipient = await UserService.getById(req.userId);
 
   let data = NewsletterHelper.buildData(newsletter, dates);
   data.recipient = {
@@ -375,7 +375,7 @@ export async function synchronizeNewsletterDatesById(req: Request, res: Response
  */
 export async function synchronizeNewsletterRecipientsById(req: Request, res: Response): Promise<any> {
   let newsletterId = parseInt(req.params.newsletterId);
-  let recipients = req.body.recipients as Array<number>;
+  let recipients = req.body.recipients as Array<string>;
 
   let syncRecipients: SynchronizeNewsletterRecipientsCommand = {
     newsletterId,
diff --git a/src/controller/admin/user/userController.ts b/src/controller/admin/user/userController.ts
index f6ad511..58d815e 100644
--- a/src/controller/admin/user/userController.ts
+++ b/src/controller/admin/user/userController.ts
@@ -31,7 +31,7 @@ export async function getAllUsers(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function getUserById(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
   let user = await UserService.getById(id);
 
   res.json(UserFactory.mapToSingle(user));
@@ -44,7 +44,7 @@ export async function getUserById(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function getUserPermissions(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
   let permissions = await UserPermissionService.getByUser(id);
 
   res.json(PermissionHelper.convertToObject(permissions.map((p) => p.permission)));
@@ -57,7 +57,7 @@ export async function getUserPermissions(req: Request, res: Response): Promise<a
  * @returns {Promise<*>}
  */
 export async function getUserRoles(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
 
   let roles = await UserService.getAssignedRolesByUserId(id);
 
@@ -71,7 +71,7 @@ export async function getUserRoles(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function updateUser(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
   let mail = req.body.mail;
   let firstname = req.body.firstname;
   let lastname = req.body.lastname;
@@ -96,7 +96,7 @@ export async function updateUser(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function updateUserPermissions(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
   let permissions = req.body.permissions;
 
   let permissionStrings = PermissionHelper.convertToStringArray(permissions);
@@ -117,7 +117,7 @@ export async function updateUserPermissions(req: Request, res: Response): Promis
  * @returns {Promise<*>}
  */
 export async function updateUserRoles(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
   let roleIds = req.body.roleIds as Array<number>;
 
   let updateRoles: UpdateUserRolesCommand = {
@@ -136,7 +136,7 @@ export async function updateUserRoles(req: Request, res: Response): Promise<any>
  * @returns {Promise<*>}
  */
 export async function deleteUser(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.params.id);
+  const id = req.params.id;
 
   let { mail, isOwner } = await UserService.getById(id);
 
diff --git a/src/controller/userController.ts b/src/controller/userController.ts
index a29487b..fb5b874 100644
--- a/src/controller/userController.ts
+++ b/src/controller/userController.ts
@@ -16,7 +16,7 @@ import ForbiddenRequestException from "../exceptions/forbiddenRequestException";
  * @returns {Promise<*>}
  */
 export async function getMeById(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.userId);
+  const id = req.userId;
   let user = await UserService.getById(id);
 
   res.json(UserFactory.mapToSingle(user));
@@ -29,7 +29,7 @@ export async function getMeById(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function getMyTotp(req: Request, res: Response): Promise<any> {
-  const userId = parseInt(req.userId);
+  const userId = req.userId;
 
   let { secret } = await UserService.getById(userId);
 
@@ -54,7 +54,7 @@ export async function getMyTotp(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function verifyMyTotp(req: Request, res: Response): Promise<any> {
-  const userId = parseInt(req.userId);
+  const userId = req.userId;
   let totp = req.body.totp;
 
   let { secret } = await UserService.getById(userId);
@@ -78,7 +78,7 @@ export async function verifyMyTotp(req: Request, res: Response): Promise<any> {
  * @returns {Promise<*>}
  */
 export async function transferOwnership(req: Request, res: Response): Promise<any> {
-  const userId = parseInt(req.userId);
+  const userId = req.userId;
   let toId = req.body.toId;
 
   let { isOwner } = await UserService.getById(userId);
@@ -102,7 +102,7 @@ export async function transferOwnership(req: Request, res: Response): Promise<an
  * @returns {Promise<*>}
  */
 export async function updateMe(req: Request, res: Response): Promise<any> {
-  const id = parseInt(req.userId);
+  const id = req.userId;
   let mail = req.body.mail;
   let firstname = req.body.firstname;
   let lastname = req.body.lastname;
diff --git a/src/entity/club/member/communication.ts b/src/entity/club/member/communication.ts
index c3c79fc..574f3c5 100644
--- a/src/entity/club/member/communication.ts
+++ b/src/entity/club/member/communication.ts
@@ -38,7 +38,7 @@ export class communication {
   streetNumberAddition: string;
 
   @Column()
-  memberId: number;
+  memberId: string;
 
   @Column()
   typeId: number;
diff --git a/src/entity/club/member/member.ts b/src/entity/club/member/member.ts
index d20ba70..a584222 100644
--- a/src/entity/club/member/member.ts
+++ b/src/entity/club/member/member.ts
@@ -8,8 +8,8 @@ import { salutation } from "../../settings/salutation";
 
 @Entity()
 export class member {
-  @PrimaryColumn({ generated: "increment", type: "int" })
-  id: number;
+  @PrimaryColumn({ generated: "uuid", type: "varchar" })
+  id: string;
 
   @Column({ type: "varchar", length: 255 })
   firstname: string;
diff --git a/src/entity/club/member/memberAwards.ts b/src/entity/club/member/memberAwards.ts
index ef5b473..bf11ee6 100644
--- a/src/entity/club/member/memberAwards.ts
+++ b/src/entity/club/member/memberAwards.ts
@@ -17,7 +17,7 @@ export class memberAwards {
   date: Date;
 
   @Column()
-  memberId: number;
+  memberId: string;
 
   @Column()
   awardId: number;
diff --git a/src/entity/club/member/memberExecutivePositions.ts b/src/entity/club/member/memberExecutivePositions.ts
index b4475ef..0051184 100644
--- a/src/entity/club/member/memberExecutivePositions.ts
+++ b/src/entity/club/member/memberExecutivePositions.ts
@@ -17,7 +17,7 @@ export class memberExecutivePositions {
   end?: Date;
 
   @Column()
-  memberId: number;
+  memberId: string;
 
   @Column()
   executivePositionId: number;
diff --git a/src/entity/club/member/memberQualifications.ts b/src/entity/club/member/memberQualifications.ts
index c4d7d09..78cd610 100644
--- a/src/entity/club/member/memberQualifications.ts
+++ b/src/entity/club/member/memberQualifications.ts
@@ -20,7 +20,7 @@ export class memberQualifications {
   terminationReason?: string;
 
   @Column()
-  memberId: number;
+  memberId: string;
 
   @Column()
   qualificationId: number;
diff --git a/src/entity/club/member/membership.ts b/src/entity/club/member/membership.ts
index aa14f27..14e9b6f 100644
--- a/src/entity/club/member/membership.ts
+++ b/src/entity/club/member/membership.ts
@@ -17,7 +17,7 @@ export class membership {
   terminationReason?: string;
 
   @Column()
-  memberId: number;
+  memberId: string;
 
   @Column()
   statusId: number;
diff --git a/src/entity/club/newsletter/newsletterRecipients.ts b/src/entity/club/newsletter/newsletterRecipients.ts
index 21f696f..840f178 100644
--- a/src/entity/club/newsletter/newsletterRecipients.ts
+++ b/src/entity/club/newsletter/newsletterRecipients.ts
@@ -4,11 +4,11 @@ import { member } from "../member/member";
 
 @Entity()
 export class newsletterRecipients {
-  @PrimaryColumn({ type: "int" })
+  @PrimaryColumn()
   newsletterId: number;
 
-  @PrimaryColumn({ type: "int" })
-  memberId: number;
+  @PrimaryColumn()
+  memberId: string;
 
   @ManyToOne(() => newsletter, (newsletter) => newsletter.recipients, {
     nullable: false,
diff --git a/src/entity/club/protocol/protocolPresence.ts b/src/entity/club/protocol/protocolPresence.ts
index 15fe061..707d6e5 100644
--- a/src/entity/club/protocol/protocolPresence.ts
+++ b/src/entity/club/protocol/protocolPresence.ts
@@ -5,7 +5,7 @@ import { member } from "../member/member";
 @Entity()
 export class protocolPresence {
   @PrimaryColumn()
-  memberId: number;
+  memberId: string;
 
   @PrimaryColumn()
   protocolId: number;
diff --git a/src/helpers/jwtHelper.ts b/src/helpers/jwtHelper.ts
index 791af2a..11a5232 100644
--- a/src/helpers/jwtHelper.ts
+++ b/src/helpers/jwtHelper.ts
@@ -50,7 +50,7 @@ export abstract class JWTHelper {
     });
   }
 
-  static async buildToken(id: number): Promise<string> {
+  static async buildToken(id: string): Promise<string> {
     let { firstname, lastname, mail, username, isOwner } = await UserService.getById(id);
     let userPermissions = await UserPermissionService.getByUser(id);
     let userPermissionStrings = userPermissions.map((e) => e.permission);
@@ -86,7 +86,7 @@ export abstract class JWTHelper {
     let permissionObject = PermissionHelper.convertToObject(webapiPermissionStrings);
 
     let jwtData: JWTToken = {
-      userId: id,
+      userId: id.toString(),
       mail: "",
       username: title,
       firstname: "",
diff --git a/src/helpers/newsletterHelper.ts b/src/helpers/newsletterHelper.ts
index 1e458c1..56f5865 100644
--- a/src/helpers/newsletterHelper.ts
+++ b/src/helpers/newsletterHelper.ts
@@ -121,7 +121,7 @@ export abstract class NewsletterHelper {
   ): Promise<Array<member>> {
     let useQuery = newsletter.recipientsByQuery?.query;
 
-    let queryMemberIds: Array<number> = [];
+    let queryMemberIds: Array<string> = [];
     if (useQuery) {
       let result = await DynamicQueryBuilder.executeQuery(
         useQuery.startsWith("{") ? JSON.parse(useQuery) : useQuery,
@@ -131,7 +131,7 @@ export abstract class NewsletterHelper {
       if (result.stats == "success") {
         let keys = Object.keys(result.rows?.[0] ?? {});
         let memberKey = keys.find((k) => k.includes("member_id"));
-        queryMemberIds = result.rows.map((t) => parseInt((t[memberKey] ?? t.id) as string));
+        queryMemberIds = result.rows.map((t) => (t[memberKey] ?? t.id) as string);
       }
     }
 
@@ -253,7 +253,7 @@ export abstract class NewsletterHelper {
 
     for (const [index, rec] of [
       ...pdfRecipients,
-      { id: 0, firstname: "Alle Mitglieder", lastname: CLUB_NAME } as member,
+      { id: "0", firstname: "Alle Mitglieder", lastname: CLUB_NAME } as member,
     ].entries()) {
       let data = this.buildData(newsletter, dates, rec, printWithAdress.includes(rec.sendNewsletter?.type?.id));
 
diff --git a/src/service/club/member/communicationService.ts b/src/service/club/member/communicationService.ts
index b828bc7..2a016d7 100644
--- a/src/service/club/member/communicationService.ts
+++ b/src/service/club/member/communicationService.ts
@@ -5,10 +5,10 @@ import InternalException from "../../../exceptions/internalException";
 export default abstract class CommunicationService {
   /**
    * @description get all by member id
-   * @param {number} memberId
+   * @param {string} memberId
    * @returns {Promise<Array<communication>>}
    */
-  static async getAll(memberId: number): Promise<Array<communication>> {
+  static async getAll(memberId: string): Promise<Array<communication>> {
     return await dataSource
       .getRepository(communication)
       .createQueryBuilder("communication")
@@ -27,11 +27,11 @@ export default abstract class CommunicationService {
 
   /**
    * @description get all by memberId and recordId
-   * @param {number} memberId
+   * @param {string} memberId
    * @param {number} recordId
    * @returns {Promise<communication>}
    */
-  static async getById(memberId: number, recordId: number): Promise<communication> {
+  static async getById(memberId: string, recordId: number): Promise<communication> {
     return await dataSource
       .getRepository(communication)
       .createQueryBuilder("communication")
diff --git a/src/service/club/member/memberAwardService.ts b/src/service/club/member/memberAwardService.ts
index db69f06..8e3aa8e 100644
--- a/src/service/club/member/memberAwardService.ts
+++ b/src/service/club/member/memberAwardService.ts
@@ -5,10 +5,10 @@ import InternalException from "../../../exceptions/internalException";
 export default abstract class MemberAwardService {
   /**
    * @description get all by member id
-   * @param {number} memberId
+   * @param {string} memberId
    * @returns {Promise<Array<memberAwards>>}
    */
-  static async getAll(memberId: number): Promise<Array<memberAwards>> {
+  static async getAll(memberId: string): Promise<Array<memberAwards>> {
     return await dataSource
       .getRepository(memberAwards)
       .createQueryBuilder("memberAwards")
@@ -26,11 +26,11 @@ export default abstract class MemberAwardService {
 
   /**
    * @description get by memberId and recordId
-   * @param {number} memberId
+   * @param {string} memberId
    * @param {number} recordId
    * @returns {Promise<Array<member>>}
    */
-  static async getById(memberId: number, recordId: number): Promise<memberAwards> {
+  static async getById(memberId: string, recordId: number): Promise<memberAwards> {
     return await dataSource
       .getRepository(memberAwards)
       .createQueryBuilder("memberAwards")
diff --git a/src/service/club/member/memberExecutivePositionService.ts b/src/service/club/member/memberExecutivePositionService.ts
index ff15ba0..93d76eb 100644
--- a/src/service/club/member/memberExecutivePositionService.ts
+++ b/src/service/club/member/memberExecutivePositionService.ts
@@ -5,10 +5,10 @@ import InternalException from "../../../exceptions/internalException";
 export default abstract class MemberExecutivePositionService {
   /**
    * @description get all by member id
-   * @param {number} memberId
+   * @param {string} memberId
    * @returns {Promise<Array<memberExecutivePositions>>}
    */
-  static async getAll(memberId: number): Promise<Array<memberExecutivePositions>> {
+  static async getAll(memberId: string): Promise<Array<memberExecutivePositions>> {
     return await dataSource
       .getRepository(memberExecutivePositions)
       .createQueryBuilder("memberExecutivePositions")
@@ -27,11 +27,11 @@ export default abstract class MemberExecutivePositionService {
 
   /**
    * @description get by memberId and recordId
-   * @param {number} memberId
+   * @param {string} memberId
    * @param {number} recordId
    * @returns {Promise<Array<member>>}
    */
-  static async getById(memberId: number, recordId: number): Promise<memberExecutivePositions> {
+  static async getById(memberId: string, recordId: number): Promise<memberExecutivePositions> {
     return await dataSource
       .getRepository(memberExecutivePositions)
       .createQueryBuilder("memberExecutivePositions")
diff --git a/src/service/club/member/memberQualificationService.ts b/src/service/club/member/memberQualificationService.ts
index 84c6a5f..afd3ee5 100644
--- a/src/service/club/member/memberQualificationService.ts
+++ b/src/service/club/member/memberQualificationService.ts
@@ -5,10 +5,10 @@ import InternalException from "../../../exceptions/internalException";
 export default abstract class MemberQualificationService {
   /**
    * @description get all by member id
-   * @param {number} memberId
+   * @param {string} memberId
    * @returns {Promise<Array<memberQualifications>>}
    */
-  static async getAll(memberId: number): Promise<Array<memberQualifications>> {
+  static async getAll(memberId: string): Promise<Array<memberQualifications>> {
     return await dataSource
       .getRepository(memberQualifications)
       .createQueryBuilder("memberQualifications")
@@ -26,11 +26,11 @@ export default abstract class MemberQualificationService {
 
   /**
    * @description get by memberId and recordId
-   * @param {number} memberId
+   * @param {string} memberId
    * @param {number} recordId
    * @returns {Promise<Array<member>>}
    */
-  static async getById(memberId: number, recordId: number): Promise<memberQualifications> {
+  static async getById(memberId: string, recordId: number): Promise<memberQualifications> {
     return await dataSource
       .getRepository(memberQualifications)
       .createQueryBuilder("memberQualifications")
diff --git a/src/service/club/member/memberService.ts b/src/service/club/member/memberService.ts
index 4c7ddb3..5ec6d09 100644
--- a/src/service/club/member/memberService.ts
+++ b/src/service/club/member/memberService.ts
@@ -20,7 +20,7 @@ export default abstract class MemberService {
     count?: number;
     search?: string;
     noLimit?: boolean;
-    ids?: Array<number>;
+    ids?: Array<string>;
   }): Promise<[Array<member>, number]> {
     let query = dataSource
       .getRepository(member)
@@ -96,10 +96,10 @@ export default abstract class MemberService {
 
   /**
    * @description get member by id
-   * @param {number} id
+   * @param {string} id
    * @returns {Promise<member>}
    */
-  static async getById(id: number): Promise<member> {
+  static async getById(id: string): Promise<member> {
     return await dataSource
       .getRepository(member)
       .createQueryBuilder("member")
@@ -146,10 +146,10 @@ export default abstract class MemberService {
 
   /**
    * @description get member statistics by id
-   * @param {number} id
+   * @param {string} id
    * @returns {Promise<memberView>}
    */
-  static async getStatisticsById(id: number): Promise<memberView> {
+  static async getStatisticsById(id: string): Promise<memberView> {
     return await dataSource
       .getRepository(memberView)
       .createQueryBuilder("memberView")
@@ -187,10 +187,10 @@ export default abstract class MemberService {
 
   /**
    * @description get newsletter by member by id
-   * @param {number} id
+   * @param {string} id
    * @returns {Promise<member>}
    */
-  static async getNewsletterById(id: number): Promise<member> {
+  static async getNewsletterById(id: string): Promise<member> {
     return await dataSource
       .getRepository(member)
       .createQueryBuilder("member")
diff --git a/src/service/club/member/membershipService.ts b/src/service/club/member/membershipService.ts
index 8ef99e1..5067e81 100644
--- a/src/service/club/member/membershipService.ts
+++ b/src/service/club/member/membershipService.ts
@@ -6,10 +6,10 @@ import { membershipView } from "../../../views/membershipsView";
 export default abstract class MembershipService {
   /**
    * @description get all by member id
-   * @param {number} memberId
+   * @param {string} memberId
    * @returns {Promise<Array<membership>>}
    */
-  static async getAll(memberId: number): Promise<Array<membership>> {
+  static async getAll(memberId: string): Promise<Array<membership>> {
     return await dataSource
       .getRepository(membership)
       .createQueryBuilder("membership")
@@ -27,11 +27,11 @@ export default abstract class MembershipService {
 
   /**
    * @description get by memberId and recordId
-   * @param {number} memberId
+   * @param {string} memberId
    * @param {number} recordId
    * @returns {Promise<Array<member>>}
    */
-  static async getById(memberId: number, recordId: number): Promise<membership> {
+  static async getById(memberId: string, recordId: number): Promise<membership> {
     return await dataSource
       .getRepository(membership)
       .createQueryBuilder("membership")
@@ -49,10 +49,10 @@ export default abstract class MembershipService {
 
   /**
    * @description get membership statistics by memberId
-   * @param {number} memberId
+   * @param {string} memberId
    * @returns {Promise<Array<membershipView>>}
    */
-  static async getStatisticsById(memberId: number): Promise<Array<membershipView>> {
+  static async getStatisticsById(memberId: string): Promise<Array<membershipView>> {
     return await dataSource
       .getRepository(membershipView)
       .createQueryBuilder("membershipView")
diff --git a/src/service/user/userPermissionService.ts b/src/service/user/userPermissionService.ts
index 2f5a059..0078ee3 100644
--- a/src/service/user/userPermissionService.ts
+++ b/src/service/user/userPermissionService.ts
@@ -5,10 +5,10 @@ import InternalException from "../../exceptions/internalException";
 export default abstract class UserPermissionService {
   /**
    * @description get permission by user
-   * @param userId number
+   * @param userId string
    * @returns {Promise<Array<userPermission>>}
    */
-  static async getByUser(userId: number): Promise<Array<userPermission>> {
+  static async getByUser(userId: string): Promise<Array<userPermission>> {
     return await dataSource
       .getRepository(userPermission)
       .createQueryBuilder("permission")
diff --git a/src/service/user/userService.ts b/src/service/user/userService.ts
index 45102a5..b75d499 100644
--- a/src/service/user/userService.ts
+++ b/src/service/user/userService.ts
@@ -28,10 +28,10 @@ export default abstract class UserService {
 
   /**
    * @description get user by id
-   * @param id number
+   * @param id string
    * @returns {Promise<user>}
    */
-  static async getById(id: number): Promise<user> {
+  static async getById(id: string): Promise<user> {
     return await dataSource
       .getRepository(user)
       .createQueryBuilder("user")
@@ -110,10 +110,10 @@ export default abstract class UserService {
 
   /**
    * @description get roles assigned to user
-   * @param userId number
+   * @param userId string
    * @returns {Promise<Array<role>>}
    */
-  static async getAssignedRolesByUserId(userId: number): Promise<Array<role>> {
+  static async getAssignedRolesByUserId(userId: string): Promise<Array<role>> {
     return await dataSource
       .getRepository(user)
       .createQueryBuilder("user")
diff --git a/src/type/jwtTypes.ts b/src/type/jwtTypes.ts
index 1d65d38..6a0486d 100644
--- a/src/type/jwtTypes.ts
+++ b/src/type/jwtTypes.ts
@@ -5,7 +5,7 @@ export type JWTData = {
 };
 
 export type JWTToken = {
-  userId: number;
+  userId: string;
   mail: string;
   username: string;
   firstname: string;
diff --git a/src/viewmodel/admin/club/member/member.models.ts b/src/viewmodel/admin/club/member/member.models.ts
index 2254d68..466a6f7 100644
--- a/src/viewmodel/admin/club/member/member.models.ts
+++ b/src/viewmodel/admin/club/member/member.models.ts
@@ -3,7 +3,7 @@ import { CommunicationViewModel } from "./communication.models";
 import { MembershipViewModel } from "./membership.models";
 
 export interface MemberViewModel {
-  id: number;
+  id: string;
   salutation: SalutationViewModel;
   firstname: string;
   lastname: string;
@@ -18,7 +18,7 @@ export interface MemberViewModel {
 }
 
 export interface MemberStatisticsViewModel {
-  id: number;
+  id: string;
   salutation: string;
   firstname: string;
   lastname: string;
diff --git a/src/viewmodel/admin/club/member/membership.models.ts b/src/viewmodel/admin/club/member/membership.models.ts
index 1db540a..6b53086 100644
--- a/src/viewmodel/admin/club/member/membership.models.ts
+++ b/src/viewmodel/admin/club/member/membership.models.ts
@@ -12,7 +12,7 @@ export interface MembershipStatisticsViewModel {
   durationInYears: string;
   status: string;
   statusId: number;
-  memberId: number;
+  memberId: string;
   memberSalutation: string;
   memberFirstname: string;
   memberLastname: string;
diff --git a/src/viewmodel/admin/club/newsletter/newsletterRecipients.models.ts b/src/viewmodel/admin/club/newsletter/newsletterRecipients.models.ts
index 7db108a..25f0170 100644
--- a/src/viewmodel/admin/club/newsletter/newsletterRecipients.models.ts
+++ b/src/viewmodel/admin/club/newsletter/newsletterRecipients.models.ts
@@ -2,6 +2,6 @@ import { MemberViewModel } from "../member/member.models";
 
 export interface NewsletterRecipientsViewModel {
   newsletterId: number;
-  memberId: number;
+  memberId: string;
   member: MemberViewModel;
 }
diff --git a/src/viewmodel/admin/club/protocol/protocolPresence.models.ts b/src/viewmodel/admin/club/protocol/protocolPresence.models.ts
index 9bc363c..c954966 100644
--- a/src/viewmodel/admin/club/protocol/protocolPresence.models.ts
+++ b/src/viewmodel/admin/club/protocol/protocolPresence.models.ts
@@ -1,7 +1,5 @@
-import { MemberViewModel } from "../member/member.models";
-
 export interface ProtocolPresenceViewModel {
-  memberId: number;
+  memberId: string;
   absent: boolean;
   excused: boolean;
   protocolId: number;
diff --git a/src/viewmodel/admin/user/user.models.ts b/src/viewmodel/admin/user/user.models.ts
index 8bc495b..b9c5984 100644
--- a/src/viewmodel/admin/user/user.models.ts
+++ b/src/viewmodel/admin/user/user.models.ts
@@ -2,7 +2,7 @@ import { PermissionObject } from "../../../type/permissionTypes";
 import { RoleViewModel } from "./role.models";
 
 export interface UserViewModel {
-  id: number;
+  id: string;
   username: string;
   mail: string;
   firstname: string;
diff --git a/src/views/memberExecutivePositionView.ts b/src/views/memberExecutivePositionView.ts
index c1df465..6bac173 100644
--- a/src/views/memberExecutivePositionView.ts
+++ b/src/views/memberExecutivePositionView.ts
@@ -35,7 +35,7 @@ export class memberExecutivePositionsView {
   positionId: number;
 
   @ViewColumn()
-  memberId: number;
+  memberId: string;
 
   @ViewColumn()
   memberSalutation: string;
diff --git a/src/views/memberQualificationsView.ts b/src/views/memberQualificationsView.ts
index b22e05e..9db700c 100644
--- a/src/views/memberQualificationsView.ts
+++ b/src/views/memberQualificationsView.ts
@@ -35,7 +35,7 @@ export class memberQualificationsView {
   qualificationId: number;
 
   @ViewColumn()
-  memberId: number;
+  memberId: string;
 
   @ViewColumn()
   memberSalutation: string;
diff --git a/src/views/memberView.ts b/src/views/memberView.ts
index 90debc3..74be622 100644
--- a/src/views/memberView.ts
+++ b/src/views/memberView.ts
@@ -19,7 +19,7 @@ import { member } from "../entity/club/member/member";
 })
 export class memberView {
   @ViewColumn()
-  id: number;
+  id: string;
 
   @ViewColumn()
   salutation: string;
diff --git a/src/views/membershipsView.ts b/src/views/membershipsView.ts
index 1c764bf..52ebcc7 100644
--- a/src/views/membershipsView.ts
+++ b/src/views/membershipsView.ts
@@ -39,7 +39,7 @@ export class membershipView {
   statusId: number;
 
   @ViewColumn()
-  memberId: number;
+  memberId: string;
 
   @ViewColumn()
   memberSalutation: string;