I have a service in Angular:

export class AuthService {
  apiURL = `${environment.apiURL}/${EndPoints.auth}`;
  constructor(private http: HttpClient, private store: Store<AppState>) {}

  loggedUser$ = this.store.select(selectIsUserLogged);

  login(body: LoginData): Observable<ResponseUser> {
    return this.http.post<ResponseUser>(
      `${this.apiURL}/${EndPoints.login}`,
      body,
      {
        withCredentials: true,
      }
    );
  }

  logout(): Observable<MessageResponse> {
    return this.http.get<MessageResponse>(
      `${this.apiURL}/${EndPoints.logout}`,
      {
        withCredentials: true,
      }
    );
  }

  register(body: RegisterData): Observable<MessageResponse> {
    return this.http.post<MessageResponse>(
      `${this.apiURL}/${EndPoints.register}`,
      body
    );
  }

  autoLogin(): Observable<ResponseUser> {
    return this.http.get<ResponseUser>(
      `${this.apiURL}/${EndPoints.autoLogin}`,
      {
        withCredentials: true,
      }
    );
  }
}

And I want to write unit test to this service. This is my code:

describe('AuthService', () => {
  let service: AuthService;
  let testingController: HttpTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule, StoreModule.forRoot({})],
      providers: [AuthService],
    });
    service = TestBed.inject(AuthService);
    testingController = TestBed.inject(HttpTestingController);
  });

  it('should be created', () => {
    expect(service).toBeTruthy();
  });

  it('should user be register', (done) => {
    const body: RegisterData = {
      email: '[email protected]',
      firstName: 'test',
      lastName: 'test',
      password: '12345678',
    };

    const messageResponse = {
      message: 'User registered successfully',
    };

    service.register(body).subscribe((response) => {
      expect(response).toBeTruthy();
    });

    const mokcReq = testingController.expectOne(
      `${environment.apiURL}/${EndPoints.auth}/${EndPoints.register}`
    );
    mokcReq.flush(messageResponse.message);
    testingController.verify();
  });
});

And I have an error:
Error: Timeout - Async function did not complete within 5000ms (set by jasmine.DEFAULT_TIMEOUT_INTERVAL)

I try to extend default timeout, but problem is somewhere else.
Also i want to ask how to tests the others method from service. And I don’t know if understand correctly, when I tests register user will be create at the database and when I run tests next time I get the error that I want to create user with the same data.