Google Login Configuration?

I tried setting up Google Authentication, but I can’t make it work. I tried setting up the following:

[[auth]]
backend=desktop.auth.backend.OIDCBackend

[liboauth]
consumer_key_google=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
consumer_secret_google=XXXXXXXXXXXXXXXXXXXXXXXXXX
request_token_url_google=https://accounts.google.com/o/oauth2/auth
access_token_url_google=https://accounts.google.com/o/oauth2/token
authenticate_url_google=https://www.googleapis.com/oauth2/v1/userinfo?access_token=

But this doesn’t work, because the section liboauth is never read. Selecting backend=desktop.auth.backend.OIDCBackend matches the section [[oidc]] which doesn’t look the same as the [liboauth] one. Could anyone help with this?