public async void authenticate()
{
var auth = restService.AuntenticateUser(authUser);
if (auth.Result.Result)
{
TokenTransporter.Instance.Token = auth.Result.Token;
Application.Current.MainPage = new NavigationPage(new Menu());
}
else
{
await Application.Current.MainPage.DisplayAlert("Error", "Email o Contraseña Incorrectos", "OK");
}
}
