HttpRequest.BodyPublisher POST does not have any value

Good day everyone, I am having trouble running a very simple test code that uses HttpClient, HttpRequest and BodyPublisher. Can anyone please help me verify if the response I get from running Serial.out.println(request.toString) is correct.

This is the output:

https://www.myserviceweb.com POST

I am expecting it to be like:

https://www.myserviceweb.com POST "some message body"

By the way below is my test code.

public class test {
    public static void main(String[] args) throws IOException, InterruptedException {

        HttpClient client = HttpClient.newHttpClient();
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://www.myserviceweb.com"))
                .header("Content-Type", "text/plain; charset=UTF-8")
                .POST(HttpRequest.BodyPublishers.ofString("some message body"))
                .build();

        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

        Serial.out.println(request.toString());
        Serial.out.println(response.toString());
    }
 }