/**
  * add a data user
  * 
  * @param array $data
  * @return int
  */
 public function insert($data)
 {
     $data['password'] = md5($data['password']);
     return parent::insert($data);
 }
 /**
  * insert a new token
  * 
  * @param array $data
  */
 public function insert($data)
 {
     return parent::insert($data);
 }
 /**
  * insert a log
  * 
  * @param int $userId
  * @param string $userType
  */
 public function insertTrafficLogin($userId, $userType)
 {
     $data = array('userId' => $userId, 'userType' => $userType, 'dateInserted' => date('Y-m-d H:m:s'), 'ip' => $_SERVER['REMOTE_ADDR']);
     parent::insert($data);
 }