private async void Login() { if (string.IsNullOrEmpty(this.Email)) { await Application.Current.MainPage.DisplayAlert( "Error", "You must enter an email.", "Accept"); return; } if (string.IsNullOrEmpty(this.Password)) { await Application.Current.MainPage.DisplayAlert( "Error", "You must enter a password.", "Accept"); return; } this.IsRunning = true; this.IsEnabled = false; if (this.Email != "saup" || this.Password != "1234") { this.IsRunning = false; this.IsEnabled = true; await Application.Current.MainPage.DisplayAlert( "Error", "Email or password incorrect.", "Accept"); this.Password = string.Empty; return; } this.IsRunning = true; this.IsEnabled = false; //this.email = string.Empty; //this.password = string.Empty; MainViewModel.GetIntstance().Lands = new LandsViewModel(); await Application.Current.MainPage.Navigation.PushAsync(new LandsPage()); }