/**
  *
  */
 public function blockAction()
 {
     /**
      * @var $user \Application\Model\UserModel
      */
     $user = $this->_getUser();
     $this->_helper->allowed('block', $user);
     if ($user->getStatus() === UserModel::USER_STATUS_BLOCKED) {
         throw new InvalidArgumentException("Invalid parameter value block: blockUser");
     }
     $this->_userSrv->blockUser($user, "Api request");
 }