private function initRootCertificatePath($demo)
    {
        $rootCertificatePath = self::LIVE_ROOT_CERTIFICATE_PATH;
        if ($demo === true) {
            $rootCertificatePath = self::DEMO_ROOT_CERTIFICATE_PATH;
        }

        $this->setRootCertificatePath($rootCertificatePath);

        return $this;
    }