public function getSecurityHeader($login, $password)
    {
        $authHeader = sprintf(
            $this->getSecurityHeaderTemplate(),
            htmlspecialchars($login),
            htmlspecialchars($password)
        );

        return new \SoapHeader(
            'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd',
            'Security',
            new \SoapVar($authHeader, XSD_ANYXML)
        );
    }