Spring WebClient digest authentication

Question

I would like to implement simple REST client to receive data from the remote endpoint in my Spring project. The remote endpoint is supporting only Digest auth. I have found a solution using netty-http-authenticator. The code can be compiled and in debug view, I can see that the DigestAuthenticator and HttpClient instances are filled with the correct login. But in fact, the authentication is not sent to the server and it responds with 401. I have already tried Firefox as client and simple Flask server on localhost as server. The problem is in my Java client side. Any ideas? This is the code:

    DigestAuthenticator digestAuthenticator = new DigestAuthenticator("username", "secretpass!");
    
    HttpClient client = HttpClient.create().doOnRequest((request, connection) -> {
        connection.addHandler(new HttpObjectAggregator(1048576));
        connection.addHandler(new DigestNettyHttpAuthenticator(digestAuthenticator));
    });
    
    ReactorClientHttpConnector connector = new ReactorClientHttpConnector(client);

    WebClient spcRestClientPort = WebClient.builder()
            //.baseUrl("http://192.168.44.125/spc/")
            .baseUrl("http://127.0.0.1:5000/endpoint")
            .clientConnector(connector)
            .build();

    Mono<ResponseEntity<LoginResponseDto>> response = spcRestClientPort.get()
            .uri("/output/2/get")
            .retrieve()
            .toEntity(LoginResponseDto.class);

    response.block();