private async void submitBtn_Clicked(object sender, System.EventArgs e) { if (string.IsNullOrEmpty(UserNameEntry.Text)) { await DisplayAlert("Sorry", "UserName cannot be empty..!", "OK"); return; } if (string.IsNullOrEmpty(PasswordEntry.Text)) { await DisplayAlert("Sorry", "Password cannot be empty..!", "OK"); return; } if (PasswordEntry.Text == ConfirmPasswordEntry.Text) { _viewModel._user.Password = ConfirmPasswordEntry.Text; _viewModel.RegisterUser(); } else { ErrorLabel.IsVisible = true; } }