private function configureCurl ($email, $password)
    {
        curl_setopt_array($this->cURL, array(
            CURLOPT_URL => $this->url,
            CURLOPT_HEADER => true,
            CURLOPT_HTTPHEADER => $this->headers,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_SSLVERSION => 6
        ));

        if (!StringUtilities::isNullOrEmpty($email) && !StringUtilities::isNullOrEmpty($password))
        {
            curl_setopt_array($this->cURL, array(
                CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
                CURLOPT_USERPWD => $email . ":" . $password
            ));
        }
    }