public function create_room($name, $owner_user_id = null, $privacy = null, $topic = null, $guest_access = null) {
     $args = array(
       'name' => $name
     );

     if ($owner_user_id) {
       $args['owner_user_id'] = $owner_user_id;
     }

     if ($privacy) {
       $args['privacy'] = $privacy;
     }

     if ($topic) {
       $args['topic'] = $topic;
     }

     if ($guest_access) {
       $args['guest_access'] = (int)$guest_access;
     }

     // Return the std object
     return $this->make_request('rooms/create', $args, 'POST');
    }