protected function getDirectMembership()
    {
        if (isset($this->regid) === false) {
            $this->getGroup();
        }
        if (is_null($this->regid) === true) {
            throw new \Exception('Group Id not specified');
        }
        $resp = static::getGroupConnection()->execGET(
            "$this->identifier/member"
        );

        $this->directmembers = [];
        $this->parseMembership($resp->getData());
    }