"error_description": "client_secret is missing."

Question

Hello team I have a Application on https://console.cloud.google.com of type Desktop

once after signin with the test user credentials , i have returned successfully and then trying to get the token using the

final String tokenUrl = "https://oauth2.googleapis.com/token";

    // The original redirect URL

    final URI redirectUri = new URI(this.redirectUri);

    // Using HttpClient to make the POST to exchange the auth code for the token

    HttpClient client = HttpClientBuilder.create().build();
    HttpPost post = new HttpPost(tokenUrl);

    // Adding the POST params to the request

    List<NameValuePair> urlParameters = new ArrayList<NameValuePair>();
   
    urlParameters.add(new BasicNameValuePair("code", code));       
    urlParameters.add(new BasicNameValuePair("client_id", googleClientId));
    urlParameters.add(new BasicNameValuePair("client_secret", googleClientsecret));
    urlParameters.add(new BasicNameValuePair("redirect_uri", redirectUri.toString()));
    urlParameters.add(new BasicNameValuePair("scope", scope));
    urlParameters.add(new BasicNameValuePair("grant_type", grantType));

    post.setEntity(new UrlEncodedFormEntity(urlParameters));

    // Execute the request
    System.out.println(post.toString());

    HttpResponse response = client.execute(post);

    // Print the status code

    System.out.println("Response Code : " + response.getStatusLine().getStatusCode());

    // Get the content as a String

    String content = EntityUtils.toString(response.getEntity());

    System.out.println("Result : " + content.toString());

---

am getting the error as below

Response Code : 400 Result : { "error": "invalid_request", "error_description": "client_secret is missing." }

i know am not using google API's to get the token , but the api here am using also should work right?

please please help me here