function get_recorders_by_external_id($externalid) {
        try {
            $param = new \Panopto\RemoteRecorderManagement\GetRemoteRecordersByExternalId($this->auth, array($externalid));
            $recorders = $this->rrmclient->GetRemoteRecordersByExternalId($param)->getGetRemoteRecordersByExternalIdResult();
        } catch(Exception $e) {
            throw new SoapFault('client', $e->getMessage());
        }
        if (count($recorders)) {
            return $recorders;
        }
        return false;
    }