I'd like to use the Google Talent Solution (GTS).

The [set-up docs](https://cloud.google.com/talent-solution/job-search/docs/before-you-begin) explain how to set-up an Standard Env App Engine project using a service account. I've enabled GTS in my App Engine project, enabled Data Logging and added a `Service Account Token Creator` to the `App Engine default service account` that was created when I enabled GTS - `[app-id]@appspot.gserviceaccount.com`.

I've [read the docs](https://google-auth.readthedocs.io/en/latest/oauth2client-deprecation.html) for a Python AppEngine project but it uses a [deprecated API oauth2client](https://google-auth.readthedocs.io/en/latest/oauth2client-deprecation.html) and I'm trying to use `google_auth` instead (I've installed and vendored `google_api` and `google_auth`.

In my vendor `appengine_config.py`:

```
from google.appengine.ext import vendor
import os

google_api_path = "%s%s" % (os.path.dirname(os.path.realpath(__file__)), '/applications/[app-id]/modules/google_api')

```

vendor.add(google\_api\_path)

```
google_auth = "%s%s" % (os.path.dirname(os.path.realpath(__file__)), '/applications/[app-id]/modules/google')

```

vendor.add(google\_auth)

I installed google\_auth into a directory named `google`. And in a directory path `/applications/[app-id]/modules/` which works well with `Web2py`, a Python framework.

My code:

```
from google.auth import app_engine
credentials = app_engine.Credentials()
print(credentials.token)

```

Alas, `credentials.token` is `None`

In all this set-up, config and code, what have I missed?