webclient 400 Bad Request from POST

Question

I use a web client for authentication to an API but I get this error. knowing that the URI is correct . the error : org.springframework.web.reactive.function.client.WebClientResponseException$BadRequest: 400 Bad Request from POST with root cause

 ```WebClient client = WebClient.create();
    JSONObject credentials = new JSONObject();
    credentials.put("login", "admin");
    credentials.put("password", "admin");
    String response = client.post()
            .uri(new URI("http://localhost:8080/rest/auth/v1/token:create"))
            .contentType(MediaType.APPLICATION_JSON)
            .accept(MediaType.APPLICATION_JSON)
            .bodyValue(credentials)
            .retrieve()
            .bodyToMono(String.class)
            .block();```