private void ConfigureBtnSignInGplus()
{
btnGoogleSingIn = (SignInButton)FindViewById(Resource.Id.sign_in_button);
btnGoogleSingIn.SetSize(SignInButton.SizeWide);
btnGoogleSingIn.SetScopes(mGoogleSigninOptions.GetScopeArray());
btnGoogleSingIn.Click += btnGoogleSingIn_Click;
}