private void onLoginFailure(LoginEvent event) {
   logger.e("login#onLoginError -> errorCode:%s", event.name());
   showLoginPage();
   String errorTip = getString(IMUIHelper.getLoginErrorTip(event));
   logger.d("login#errorTip:%s", errorTip);
   mLoginStatusView.setVisibility(View.GONE);
   Toast.makeText(this, errorTip, Toast.LENGTH_SHORT).show();
 }