public function deleteAction()
 {
     $modelUsers = new Model_Users();
     $modelAdminUsers = new Admin_Model_Users();
     $userId = $this->_getParam('userId');
     if (vkNgine_Config::getSystemConfig()->master->user == $userId) {
         return new vkNgine_Exception('This user can\'t be deleted');
     }
     $userInfo = $modelUsers->fetch($userId);
     $modelUsers->delete($userId);
     $modelAdminUsers->delete($userId);
     echo Zend_Json::encode(array('success' => 1, 'itemId' => $userId, 'rowId' => 'user-', 'title' => $this->t->_('Success Message'), 'message' => sprintf($this->t->_('%s was successfully deleted'), $userInfo->getFullName()), 'icon' => 'success'));
     exit;
 }