@Override
            public ListUsableWorkstationsRequest injectToken(
                ListUsableWorkstationsRequest payload, String token) {
              return ListUsableWorkstationsRequest.newBuilder(payload).setPageToken(token).build();
            }
The default scopes of the service.
java-workstations/google-cloud-workstations/src/main/java/com/google/cloud/workstations/v1/stub/WorkstationsStubSettings.java