private void OnLoginInputKeyUpExecute(RevealPasswordBox passwordBox)
 {
     if (isEnter)
     {
         PasswordBoxContext.Focus();
     }
 }
 private void OnEmailKeyUpExecute(KeyEventArgs e)
 {
     if (e.Key == Key.Enter)
     {
         PasswordBoxContext.Focus();
     }
     else if (e.Key == Key.Escape)
     {
         OnDoBackExecute();
     }
 }