/**
  * 验证用户标识
  *
  * @return string
  */
 private function checkRegisterUser()
 {
     $identify = $this->getInput('_statu', 'get');
     !$identify && ($identify = $this->getInput('_statu', 'post'));
     if (!$identify) {
         $this->showError('USER:illegal.request');
     }
     list($uid, $password) = PwRegisterService::parserRegistIdentify($identify);
     $info = $this->_getUserDs()->getUserByUid($uid, PwUser::FETCH_MAIN);
     if (Pw::getPwdCode($info['password']) != $password) {
         $this->showError('USER:illegal.request');
     }
     $this->loginUser = new PwUserBo($uid);
     return $identify;
 }