public function custom($customURI, $options = [])
    {
        $url = $this->instanceURLRepo->get();
        $url .= '/services/apexrest';
        $url .= $customURI;

        $parameters = [];

        if (isset($options['parameters'])) {
            $parameters = array_replace_recursive($parameters, $options['parameters']);
            $url .= '?'.http_build_query($parameters);
        }

        return $this->request($url, $options);
    }