/**
  * Manage all models.
  */
 public function actionIndex()
 {
     LoginForm::checkAdmin();
     $this->pageTitle = "Users";
     $model = new User('search');
     $model->unsetAttributes();
     if (isset($_GET['User'])) {
         $model->attributes = $_GET['User'];
     }
     $this->render('index', array('model' => $model));
 }