I need to configure websocket in my project.

this is my configuration: enter image description here

 @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {

        registry.addEndpoint("/ws")
                .setAllowedOriginPatterns("*")
                .withSockJS();

    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {
        registry.enableSimpleBroker("/queue", "/topic");
        registry.setApplicationDestinationPrefixes("/app");
        registry.setUserDestinationPrefix("/user");
    }

    @Override
    public void configureClientInboundChannel(ChannelRegistration registration) {
        registration.interceptors(new ChannelInterceptor() {
            @Override
            public Message<?> preSend(Message<?> message, MessageChannel channel) {
                StompHeaderAccessor accessor = StompHeaderAccessor.wrap(message);
                if (StompCommand.CONNECT.equals(accessor.getCommand())) {
                    String sessionId = accessor.getSessionId();                   
                    accessor.setUser(new WebSocketPrincipal(sessionId));
                }
                return message;
            }
        });
    }

this is code to send message back to user : enter image description here

messagingTemplate.convertAndSendToUser(
                        headers.getSessionId(),
                        "/queue/signup",
                        new SignupResponse(validator.getId(), request.getCallbackId()));

this is user side code: enter image description here

 stompClient = Stomp.over(new SockJS("/ws"));
          stompClient.connect(
            {},
            () => {
              // Handle response
              stompClient.subscribe(`/user/queue/signup`, (response) => {
                showSuccess("Authentication successful! Redirecting...");
                console.log("${response.body}");
              });
              stompClient.subscribe(`/user/queue/errors`, (error) => {
                showError(JSON.parse(error.body).error);
              });
              stompClient.send(
                "/app/validator/login",
                {},
                JSON.stringify({
                  publicKey: publicKey,
                  signature: base64Signature,
                  message: message,
                  callbackId: generateUUID(), // Client-generated
                })
              );
            },)

I'm able to send message from user to server but server is not sending back response. can anyone suggest.