public function actionPassword()
 {
     $model = new PasswordForm();
     if (isset($_POST['PasswordForm'])) {
         $model->attributes = $_POST['PasswordForm'];
         if ($model->validate()) {
             $password = UserIdentity::createPassword($model->password, $model->cost);
             return $this->render('password_generated', array('password' => $password));
         }
     }
     $model->cost = 8;
     $this->render('password', array('model' => $model));
 }