public function subscribe($data)
 {
     // get settings
     global $WishListMemberInstance;
     $webinars = $WishListMemberInstance->GetOption('webinar');
     $settings = $webinars[$this->slug];
     $webinar4 = explode('---', $settings[$data['level']]);
     if (empty($settings)) {
         return;
     }
     $obj = new OAuth_En();
     $oauth = new OAuth($obj);
     $vars['firstName'] = $data['first_name'];
     $vars['lastName'] = $data['last_name'];
     $vars['email'] = $data['email'];
     $obj->setOrganizerKey($settings['organizerkey']);
     $obj->setAccessToken($settings['accesstoken']);
     $oauth->setWebinarId($webinar4[0]);
     $oauth->setRegistrantInfo($vars);
     $oauth->createRegistrant();
 }