Fail when token env var is set but invalid

[SHxKM]

Right now I'm investigating why no comitters are shown at all in production (via GitHub pages) while the plugin works flawlessly locally (through serve and with build --strict).

I'm presuming this is because I'm doing something wrong here (action snippet):

- name: Build docs
  run: uv run mkdocs build --strict
  env:
    MKDOCS_GIT_APIKEY: ${{ secrets.GITHUB_TOKEN }}

- name: Deploy docs
  run: uv run mkdocs gh-deploy --force
  env:
    MKDOCS_GIT_APIKEY: ${{ secrets.GITHUB_TOKEN }}

I see this in the action output logs:

INFO    -  git-committers plugin ENABLED
INFO    -  DeprecationWarning: Argument login_or_token is deprecated, please use auth=github.Auth.Token(...) instead

The name matches in mkdocs.yml:

plugins:
	- git-committers:
    	repository: upwindsecurity/kb-backend
      	branch: main
        token: !!python/object/apply:os.getenv ["MKDOCS_GIT_APIKEY"] # GitHub API token for fetching committers

It'd be nice if the plugin threw an error when the env var it's looking for is there but is invalid.

Edit: or maybe this plugin does not support using a token from the action...?