Please update the quickstart guide with an example using google-auth-library-java

[SEOguruNL]

Problem
The example in the quickstart guide 'Running a Search Console App in Java' is still using the deprecated googleapis.auth.oauth2.GoogleCredential. I understand that googleapis.google-auth-library-java.credentials should be used instead.

Solution
I'd like to see an updated example in the quickstart-guide where the google-auth-library-java is used.

Additional context
I've asked this question on several places, but nobody seems to be able to come up with an example.

[haimraman]

I was missing this documentation as well, what I was able to figurer out from the project README
https://github.com/googleapis/google-auth-library-java#google-auth-library-credentials was this.
Credentials were generated as a service account from https://console.cloud.google.com/
with Enable G Suite domain-wide delegation

  final var accountCredentials = ServiceAccountCredentials.fromStream(new FileInputStream(
                "custom-octagon-abc1234.json"));
        ServiceAccountCredentials serviceAccountCredentials = ServiceAccountCredentials.newBuilder()
                .setClientId(accountCredentials.getClientId())
                .setClientEmail(accountCredentials.getClientEmail())
                .setPrivateKey(accountCredentials.getPrivateKey())
                .setPrivateKeyId(accountCredentials.getPrivateKeyId())
                .setScopes(SCOPES)
                .setServiceAccountUser("[email protected]")
                .setProjectId(accountCredentials.getProjectId())
                .build();

        HttpCredentialsAdapter credentialsAdapter = new HttpCredentialsAdapter(serviceAccountCredentials);
        Gmail service = new Gmail.Builder(GoogleNetHttpTransport.newTrustedTransport(),
                GsonFactory.getDefaultInstance(),
                credentialsAdapter).setApplicationName("My App").build();

        String user = "me";
        final var messagesResponse = service.users().labels().list(user).execute();
        System.out.println(messagesResponse.getLabels().stream().map(Label::getName).collect(Collectors.joining(",\n"))); 

Although it works for me I sill missing official examples and a bit lost between all the token types and when should I use IAM