public function exec()
    {
        // Set the header
        $this->buildHttpHeader();

        $parameters = [
            'headers' => $this->headers,
            'body' => $this->postFields,
            'curl' => $this->setPostCurlopts(),
        ];

        // Get all of the results 1000 at a time
        return  $this->sendData('POST', $parameters);
    }