code: public function cookieVerification()
      {
          $result = '';
          $user = null;
  
          if (!isset($_COOKIE['_cookie_accessToken'])) {
              $result = false;
          } else {
              $cookieData = unserialize($_COOKIE['_cookie_accessToken']);
              if (dbQuery($this->dbTable)->cond($this->dbAccessToken, $cookieData['token'])->first($user)) {
                  $md5_pass = $user[$this->dbHashPasswordField];
                  $md5_email = $user[$this->dbHashEmailField];
                  $auth = $this->authorizeWithEmail($md5_email, $md5_pass);
                  $result = ($auth->code == EmailStatus::SUCCESS_EMAIL_AUTHORIZE) ? true : false;
              } else {
                  $result = false;
              }
  
          }
  
          return $result;
      }
docs: Cookie verification
  
  @return boolean Sign In status