Contao\Message::generate PHP Method

    public static function generate($strScope = TL_MODE)
    {
        $strMessages = static::generateUnwrapped($strScope);
        if ($strMessages != '') {
            $strMessages = '<div class="tl_message">' . $strMessages . '</div>';
        }
        return $strMessages;
    }

 /**
  * Run the controller and parse the login template
  *
  * @return Response
  */
 public function run()
 {
     /** @var BackendTemplate|object $objTemplate */
     $objTemplate = new \BackendTemplate('be_login');
     $strHeadline = sprintf($GLOBALS['TL_LANG']['MSC']['loginTo'], \Config::get('websiteTitle'));
     $objTemplate->theme = \Backend::getTheme();
     $objTemplate->messages = \Message::generate();
     $objTemplate->base = \Environment::get('base');
     $objTemplate->language = $GLOBALS['TL_LANGUAGE'];
     $objTemplate->languages = \System::getLanguages(true);
     $objTemplate->title = \StringUtil::specialchars($strHeadline);
     $objTemplate->charset = \Config::get('characterSet');
     $objTemplate->action = ampersand(\Environment::get('request'));
     $objTemplate->userLanguage = $GLOBALS['TL_LANG']['tl_user']['language'][0];
     $objTemplate->headline = $strHeadline;
     $objTemplate->curLanguage = \Input::post('language') ?: str_replace('-', '_', $GLOBALS['TL_LANGUAGE']);
     $objTemplate->curUsername = \Input::post('username') ?: '';
     $objTemplate->uClass = $_POST && empty($_POST['username']) ? ' class="login_error"' : '';
     $objTemplate->pClass = $_POST && empty($_POST['password']) ? ' class="login_error"' : '';
     $objTemplate->loginButton = \StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['loginBT']);
     $objTemplate->username = $GLOBALS['TL_LANG']['tl_user']['username'][0];
     $objTemplate->password = $GLOBALS['TL_LANG']['MSC']['password'][0];
     $objTemplate->feLink = $GLOBALS['TL_LANG']['MSC']['feLink'];
     $objTemplate->default = $GLOBALS['TL_LANG']['MSC']['default'];
     $objTemplate->jsDisabled = $GLOBALS['TL_LANG']['MSC']['jsDisabled'];
     return $objTemplate->getResponse();
 }