public function build()
    {
        $soapClient = (new Factory)->getClient($this->getEndpoint(), $this->getSoapOptions());

        $params['user_id'] = $this->userId;
        $params['agent_code'] = $this->agentCode;
        $params['agent_seq'] = $this->agentSeq;
        $client = new $this->client($soapClient, $params);

        if ($this->log) {
            //
        }

        return $client;
    }