style: format code for consistency and readability

frontend/src/app/service/user.service.ts

@@ -20,14 +20,14 @@ export class UserService {
   public getUser(id: string): Observable<User | null> {
     return this.http.get<User | null>(`/backend/user/${id}`).pipe(
       catchError(() => EMPTY),
-      tap(user => this.currentUserSubject.next(user))
+      tap((user) => this.currentUserSubject.next(user))
     );
   }
 
   public getCurrentUser(): Observable<User | null> {
     return this.http.get<User | null>('/backend/user').pipe(
       catchError(() => EMPTY),
-      tap(user => this.currentUserSubject.next(user))
+      tap((user) => this.currentUserSubject.next(user))
     );
   }
 
@@ -36,12 +36,12 @@ export class UserService {
   }
 
   public createUser(id: string, username: string): Observable<User> {
-    return this.http.post<User>('/backend/user', {
-      keycloakId: id,
-      username: username,
-    }).pipe(
-      tap(user => this.currentUserSubject.next(user))
-    );
+    return this.http
+      .post<User>('/backend/user', {
+        keycloakId: id,
+        username: username,
+      })
+      .pipe(tap((user) => this.currentUserSubject.next(user)));
   }
 
   public async getOrCreateUser(userProfile: KeycloakProfile) {