private async Task <bool> ValidateEmail()
{
if (await RegisterViewModel.CheckAvailableUsername(RegisterEmail.Text) == "NOTAVAILABLE")
{
RegisterEmail.Text = string.Empty;
RegisterEmail.Header = ResourceLoader.GetString("RegisterEmailHeaderEmailInUse");
RegisterEmail.BorderBrush = new SolidColorBrush(Colors.Red);
return(false);
}
return(true);
}