login: optional

[John Bliss]

Noob here:

Started new Python project via Google AppEngine which produced project files including:

\app.yaml

handlers:
- url: /.*
  script: main.app
  secure: always

Currently, navigating to project root forces me to authenticate with Google oAuth2 process. I'd like to turn that off so that I can navigate to project root without authenticating. Per:

https://developers.google.com/appengine/docs/python/config/appconfig#Python_app_yaml_Requiring_login_or_administrator_status

...I added:

login: optional

...but that did not seem to make a difference. What am I doing wrong?