function __construct($url, $api_key, $api_user = "", $api_pass = "")
 {
     $this->url = $url;
     $this->api_key = $api_key;
     AC_Connector::__construct($url, $api_key, $api_user, $api_pass);
 }
 function __construct($url, $api_key, $api_user = "", $api_pass = "")
 {
     $this->url_base = $this->url = $url;
     $this->api_key = $api_key;
     parent::__construct($url, $api_key, $api_user, $api_pass);
 }