public function Subscriber_Get_Id($attributes) {
        try {
            $ret = $this->Subscriber_Lookup($attributes);
            $uri = $ret->uri;
            $id = (int) substr(strrchr($uri, '/'), 1);
        } catch (\Exception $e) {
            if( $e->getCode() === 404){
                $id = false;
            } else {
                throw $e;
            }
        }

        return $id;
    }