public function is_logged_in()
 {
     return v6_cookie::keyvalue('user_id') > 0;
 }
 private function load_from_cookie()
 {
     if (v6_cookie::keyexists('logged_in_details') == true) {
         $this->logged_in_details = v6_cookie::keyvalue('logged_in_details');
     } else {
         $this->logged_in_details = array();
     }
 }