@Override
            public ListUsableWorkstationConfigsRequest injectToken(
                ListUsableWorkstationConfigsRequest payload, String token) {
              return ListUsableWorkstationConfigsRequest.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