http post for minecraft java

http_post.java

public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8"); 
public void whenAsynchronousPostRequest_thenCorrect(CommandSender sender) {
        JSONObject json = new JSONObject();
        JSONObjec child = new JSONObjec();
        json.put("PK", "PLAYER");
        json.put("SK", "playerID#abc@gmail.com");
        json.put("playerID", "abc@gmail.com");
        
        // child json
        child.put("age",10);
        child.put("level",0);
        // 
        json.put("playerInfo", child);
        
        OkHttpClient client = new OkHttpClient();
        RequestBody body = RequestBody.create(json.toString(), JSON);
        Request request = new Request.Builder()
                .url( "lungrow-minecraft-create-data")
                .post(body)
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
                sender.sendMessage(ChatColor.RED + "http failure" + e);
            }

            @Override
            public void onResponse(Call call, final Response response) throws IOException {
                if (!response.isSuccessful()) {
                    throw new IOException("Unexpected code " + response);
                } else {
                    // do something wih the result
                    ResponseBody responseBody = response.body();
                    sender.sendMessage(ChatColor.GREEN + "http success");
                    sender.sendMessage(ChatColor.GREEN + "response:" + responseBody.string());
                }
            }
        });
    }