OAuth2

• RFC 6749: The OAuth 2.0 Authorization Framework
• https://developers.google.com/api-client-library/python/guide/aaa_oauth
• https://developers.google.com/api-client-library/python/start/get_started
• https://developers.google.com/identity/protocols/OAuth2
• https://developers.google.com/google-apps/calendar/quickstart/python
• https://stackoverflow.com/questions/34743774/understanding-how-to-use-the-google-apis-client-library-with-python

google-auth

• https://google-auth.readthedocs.io/en/latest/
• google-auth: Credentials and account types

• https://aaronparecki.com/oauth-2-simplified/