diff --git a/bob_party/src/screens/services/conversationService/ILoaderConversation.ts b/bob_party/src/screens/services/conversationService/ILoaderConversation.ts
index fa03e90..4435be0 100644
--- a/bob_party/src/screens/services/conversationService/ILoaderConversation.ts
+++ b/bob_party/src/screens/services/conversationService/ILoaderConversation.ts
@@ -7,19 +7,19 @@ export default interface ILoaderConversation{
      * loadAllConversation methode that load every Conversation in the data management system
      * return an array of Conversation
      */
-    loadAllConversation(): Conversation[];
+    loadAllConversation(): Promise<Conversation[]>;
 
     /**
      * loadByID methode that load an array of Conversation from the data management system by its id
      * id the id we want to search
      * return a Conversation if found, if not null
      */
-    loadByID(id:string): Conversation | null;
+    loadByID(id:string): Promise<Conversation | null>;
 
     /**
      * loadByUser methode that load an array of Conversation from the data management system using a user
      * u the user we want the conversations of
      * return an array of Conversation
      */
-    loadByUser(u:User): Conversation[];
+    loadByUser(u:User): Promise<Conversation[]>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/conversationService/ISaverConversation.ts b/bob_party/src/screens/services/conversationService/ISaverConversation.ts
index d24a7f9..eaaae36 100644
--- a/bob_party/src/screens/services/conversationService/ISaverConversation.ts
+++ b/bob_party/src/screens/services/conversationService/ISaverConversation.ts
@@ -7,17 +7,17 @@ export default interface ISaverConversation{
      * c the Conversation we want to save
      */
 
-    saveConversation(c:Conversation): void;
+    saveConversation(c:Conversation): Promise<void>;
 
     /**
      * deleteConversation methode that delete a Conversation in the data management system
      * c the Conversation we want to delete
      */
-    deleteConversation(c:Conversation):void;
+    deleteConversation(c:Conversation): Promise<void>;
 
     /**
      * updateConversation methode that update a Conversation in the data management system
      * c the Conversation we want to update
      */
-    updateConversation(c:Conversation): void;
+    updateConversation(c:Conversation): Promise<void>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/matchServices/ILoaderMatch.ts b/bob_party/src/screens/services/matchServices/ILoaderMatch.ts
index 7ea53f6..c020b21 100644
--- a/bob_party/src/screens/services/matchServices/ILoaderMatch.ts
+++ b/bob_party/src/screens/services/matchServices/ILoaderMatch.ts
@@ -6,12 +6,12 @@ export default interface ILoaderMatch{
      * loadAllMatch methode that load every Match from the data management system
      * return an array of Match
      */
-    loadAllMatch(): Match[];
+    loadAllMatch(): Promise<Match[]>;
 
     /**
      * loadByID methode that load a match from the data management system by its id
      * id the id we want to search
      * return a Match if found, if not null
      */
-    loadByID(id:string): Match | null;
+    loadByID(id:string): Promise<Match | null>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/matchServices/ISaverMatch.ts b/bob_party/src/screens/services/matchServices/ISaverMatch.ts
index 9c88319..7fbd664 100644
--- a/bob_party/src/screens/services/matchServices/ISaverMatch.ts
+++ b/bob_party/src/screens/services/matchServices/ISaverMatch.ts
@@ -7,17 +7,17 @@ export default interface ISaverMatch{
      * m the Match we want to save
      */
 
-    saveMatch(m:Match): void;
+    saveMatch(m:Match): Promise<void>;
 
     /**
      * deleteMatch methode that delete a Match in the data management system
      * m the Match we want to delete
      */
-    deleteMatch(m:Match):void;
+    deleteMatch(m:Match): Promise<void>;
 
     /**
      * updateMatch methode that update a Match in the data management system
      * m the Match we want to update
      */
-    updateMatch(m:Match): void;
+    updateMatch(m:Match): Promise<void>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/messageService/IMessageLoader.ts b/bob_party/src/screens/services/messageService/IMessageLoader.ts
index eb7ed67..cb27871 100644
--- a/bob_party/src/screens/services/messageService/IMessageLoader.ts
+++ b/bob_party/src/screens/services/messageService/IMessageLoader.ts
@@ -7,19 +7,19 @@ export default interface ILoaderMessage{
      * loadAllMessage methode that load every Message from the data management system
      * return an array of Message
      */
-    loadAllMessage(): Message[];
+    loadAllMessage(): Promise<Message[]>;
 
     /**
      * loadByID methode that load a Message from the data management system by its id
      * id the id we want to search
      * return a Message if found, if not null
      */
-    loadByID(id:string): Message | null;
+    loadByID(id:string): Promise<Message | null>;
 
     /**
      * loadByUser methode that load an array of Message from the data management system using a Conversation
      * c the Conversation we want the Messages of
      * return an array of Message
      */
-    loadByConversation(c:Conversation): Message[];
+    loadByConversation(c:Conversation): Promise<Message[]>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/messageService/IMessageSaver.ts b/bob_party/src/screens/services/messageService/IMessageSaver.ts
index a83ae9e..3e328ee 100644
--- a/bob_party/src/screens/services/messageService/IMessageSaver.ts
+++ b/bob_party/src/screens/services/messageService/IMessageSaver.ts
@@ -7,6 +7,6 @@ export default interface ISaverMessage{
      * m the Message we want to save
      */
 
-    saveMessage(m:Message): void;
+    saveMessage(m:Message): Promise<void>;
 
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/userServices/ILoaderUser.ts b/bob_party/src/screens/services/userServices/ILoaderUser.ts
index cb7829c..0ffb1b9 100644
--- a/bob_party/src/screens/services/userServices/ILoaderUser.ts
+++ b/bob_party/src/screens/services/userServices/ILoaderUser.ts
@@ -8,21 +8,21 @@ export default interface ILoaderUser{
      * loadAllUser methode that load every user from the data management system
      * return an array of User
      */
-    loadAllUser(): User[];
+    loadAllUser(): Promise<User[]>;
 
     /**
      * loadByID methode that load a user from the data management system by his id
      * id the id we want to search
      * return a User if found, if not null
      */
-    loadByID(id:string): User | null;
+    loadByID(id:string): Promise<User | null>;
 
     /**
      * loadByUsername methode that load a user from the data management system by his username
      * username the username we want to search
      * return a User if found, if not null
      */
-    loadByUsername(username:string): User | null;
+    loadByUsername(username:string): Promise<User | null>;
 
     /**
      * loadByUsernamePassword methode that load a user from the data management system by his username and his password
@@ -30,17 +30,17 @@ export default interface ILoaderUser{
      * password the password we want to search
      * return a User if found, if not null
      */
-    loadByUsernamePassword(username:string, password:string): User | null;
+    loadByUsernamePassword(username:string, password:string): Promise<User | null>;
 
     /**
      * loadUserByMatch methode that load every user in a game
      * return an array of User
      */
-    loadUserByMatch(m:Match): User[];
+    loadUserByMatch(m:Match): Promise<User[]>;
 
     /**
      * laodUserByConversation methode that load every user in a Conversation
      * return an array of User
      */
-    laodUserByConversation(c:Conversation): User[];
+    loadUserByConversation(c:Conversation): Promise<User[]>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/userServices/ISaverUser.ts b/bob_party/src/screens/services/userServices/ISaverUser.ts
index 871c0b3..9fbd862 100644
--- a/bob_party/src/screens/services/userServices/ISaverUser.ts
+++ b/bob_party/src/screens/services/userServices/ISaverUser.ts
@@ -7,17 +7,17 @@ export default interface ISaverUser{
      * u the user we want to save
      */
 
-     saveUser(u:User): void;
+    saveUser(u:User): Promise<void>;
 
      /**
       * deleteUser methode that delete a User in the data management system
       * u the user we want to delete
       */
-     deleteUser(u:User):void;
+     deleteUser(u:User):Promise<void>;
  
      /**
       * updateUser methode that update a User in the data management system
       * u the user we want to update
       */
-     updateUser(u:User): void;
+     updateUser(u:User): Promise<void>;
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/userServices/fakeSaverUser.ts b/bob_party/src/screens/services/userServices/fakeSaverUser.ts
index d19e8e4..09ff653 100644
--- a/bob_party/src/screens/services/userServices/fakeSaverUser.ts
+++ b/bob_party/src/screens/services/userServices/fakeSaverUser.ts
@@ -4,13 +4,13 @@ import ISaverUser from "./ISaverUser";
 
 export default class FakeSaverUser implements ISaverUser{
     
-    saveUser(u: User): void {
+    async saveUser(u: User): Promise<void> {
         return;
     }
-    deleteUser(u: User): void {
+    async deleteUser(u: User): Promise<void> {
         return;
     }
-    updateUser(u: User): void {
+    async updateUser(u: User): Promise<void> {
         return;
     }
 }
\ No newline at end of file
diff --git a/bob_party/src/screens/services/userServices/loaderUserApi.ts b/bob_party/src/screens/services/userServices/loaderUserApi.ts
index c65f90d..e2fbe06 100644
--- a/bob_party/src/screens/services/userServices/loaderUserApi.ts
+++ b/bob_party/src/screens/services/userServices/loaderUserApi.ts
@@ -5,22 +5,22 @@ import ILoaderUser from "./ILoaderUser";
 
 export default class LoaderUserApi implements ILoaderUser{
 
-    loadAllUser(): User[] {
+    async loadAllUser(): Promise<User[]> {
         throw new Error("Method not implemented.");
     }
-    loadByID(id: string): User | null {
+    async loadByID(id: string): Promise<User | null> {
         throw new Error("Method not implemented.");
     }
-    loadByUsername(username: string): User | null {
+    async loadByUsername(username: string): Promise<User | null> {
         throw new Error("Method not implemented.");
     }
-    loadByUsernamePassword(username: string, password: string): User | null {
+    async loadByUsernamePassword(username: string, password: string): Promise<User | null> {
         throw new Error("Method not implemented.");
     }
-    loadUserByMatch(m: Match): User[] {
+    async loadUserByMatch(m: Match): Promise<User[]> {
         throw new Error("Method not implemented.");
     }
-    laodUserByConversation(c: Conversation): User[] {
+    async loadUserByConversation(c: Conversation): Promise<User[]> {
         throw new Error("Method not implemented.");
     }
 
diff --git a/bob_party/src/screens/services/userServices/saverUserApi.ts b/bob_party/src/screens/services/userServices/saverUserApi.ts
index 318e7fb..6883e4e 100644
--- a/bob_party/src/screens/services/userServices/saverUserApi.ts
+++ b/bob_party/src/screens/services/userServices/saverUserApi.ts
@@ -4,13 +4,13 @@ import ISaverUser from "./ISaverUser";
 
 export default class SaverUserApi implements ISaverUser{
 
-    saveUser(u: User): void {
+    async saveUser(u: User): Promise<void> {
         throw new Error("Method not implemented.");
     }
-    deleteUser(u: User): void {
+    async deleteUser(u: User): Promise<void> {
         throw new Error("Method not implemented.");
     }
-    updateUser(u: User): void {
+    async updateUser(u: User): Promise<void> {
         throw new Error("Method not implemented.");
     }
 
diff --git a/bob_party/src/screens/services/userServices/stub.ts b/bob_party/src/screens/services/userServices/stub.ts
index 7e37f45..1e2d32e 100644
--- a/bob_party/src/screens/services/userServices/stub.ts
+++ b/bob_party/src/screens/services/userServices/stub.ts
@@ -13,10 +13,10 @@ export default class StubUser implements ILoaderUser{
         new User("17", "Fefe63", "jesuishm", "ouioui", "homme", new Date(2022,12,12), 12222, 123324, 12, new Skin("S0001", "Bob",require('bob_party/assets/BobsSkins/BobClassic.png'), 0), [new Skin("S0001", "Bob",require('bob_party/assets/BobsSkins/BobClassic.png'), 0)]),
     ];
 
-    loadAllUser(): User[] {
+    async loadAllUser(): Promise<User[]> {
         return this.tabUS;
     }
-    loadByID(id: string): User | null {
+    async loadByID(id: string): Promise<User | null> {
         for(let u of this.tabUS){
             if (u.getId()==id){
                 return u;
@@ -24,7 +24,7 @@ export default class StubUser implements ILoaderUser{
         }
         return null;
     }
-    loadByUsername(username: string): User | null {
+    async loadByUsername(username: string): Promise<User | null> {
         for(let u of this.tabUS){
             if (u.getUsername()==username){
                 return u;
@@ -32,7 +32,7 @@ export default class StubUser implements ILoaderUser{
         }
         return null;
     }
-    loadByUsernamePassword(username: string, password: string): User | null {
+    async loadByUsernamePassword(username: string, password: string): Promise<User | null> {
         for(let u of this.tabUS){
             if (u.getUsername()==username && u.getPassword()==password){
                 return u;
@@ -41,14 +41,14 @@ export default class StubUser implements ILoaderUser{
         return null;
     }
 
-    loadUserByMatch(m: Match): User[] {
+    async loadUserByMatch(m: Match): Promise<User[]> {
         let tabUser:User[]=[];
         m.getTabUsers().forEach(u => {
             tabUser.push(u);
         });
         return tabUser;
     }
-    laodUserByConversation(c: Conversation): User[] {
+    async loadUserByConversation(c: Conversation): Promise<User[]> {
         let tabUser:User[]=[];
         c.getTabUser().forEach(u => {
             tabUser.push(u);