Spring boot Api Gus

public GusApiService() {
        SaajSoapMessageFactory messageFactory = new SaajSoapMessageFactory();
        messageFactory.afterPropertiesSet();
        this.webServiceTemplate = new WebServiceTemplate(messageFactory);

        Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
        marshaller.setClassesToBeBound(SoapRequest.class, SoapResponse.class, ObjectFactory.class);
        marshaller.setMtomEnabled(true);
        this.webServiceTemplate.setMarshaller(marshaller);
        this.webServiceTemplate.setUnmarshaller(marshaller);

        HttpComponentsMessageSender sender = new HttpComponentsMessageSender();
        sender.setConnectionTimeout(5000);
        sender.setReadTimeout(10000);
        this.webServiceTemplate.setMessageSender(sender);
    }

    public void login() {
        System.out.println("🔄 Logowanie do GUS...");

        String requestXml = String.format("""
        <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:ns="http://CIS/BIR/PUBL/2014/07"> 
        <soap:Header xmlns:wsa="http://www.w3.org/2005/08/addressing"> 
        <wsa:To>https://wyszukiwarkaregontest.stat.gov.pl/wsBIR/UslugaBIRzewnPubl.svc</wsa:To>
         <wsa:Action>http://CIS/BIR/PUBL/2014/07/IUslugaBIRzewnPubl/Zaloguj</wsa:Action>
          </soap:Header>
           <soap:Body> 
          <ns:Zaloguj> 
          <ns:pKluczUzytkownika>%s</ns:pKluczUzytkownika> 
          </ns:Zaloguj> 
          </soap:Body> 
          </soap:Envelope>
        """, API_KEY);

        System.out.println("📤 Wysyłane XML (logowanie):");
        System.out.println(requestXml);

        try {
            SoapResponse response = (SoapResponse) webServiceTemplate.marshalSendAndReceive(
                    LOGIN_URL,
                    new SoapRequest(requestXml),
                    new CustomSoapActionCallback("")
            );

            System.out.println("✅ Odpowiedź serwera GUS (logowanie): " + response.getResult());

            this.sessionId = response.getResult();
            if (sessionId == null || sessionId.isEmpty()) {
                throw new RuntimeException("❌ Nie udało się pobrać sessionId.");
            }
            System.out.println("✅ Zalogowano do GUS, sessionId: " + sessionId);
        } catch (Exception ex) {
            System.err.println("❌ Błąd logowania do GUS: " + ex.getMessage());
            throw new RuntimeException("Błąd logowania do GUS.", ex);
        }
    }