public async void SignUp() { Console.WriteLine($"Sign Up!"); bool isRegistrationSuccessful = await serverWorker.TaskRegistrateNewPlayer( User.Name, User.LastName, User.Login, User.Password, User.ConfirmPassword, String.Format("{0:dd-MM-yyyy}", User.Birthday), User.Email, loginPageViewModel.Token ?? ""); if (isRegistrationSuccessful) { RegistrationStep += 1; } else { await App.Current.MainPage.DisplayAlert("Error", "Registration unsuccessful =( Try again later", "OK"); } }