Note that whitelist should be used if not in 1.2
Note that whitelist should be used if not in 1.2

As commented in https://github.com/jupyterhub/oauthenticator/pull/366#pullrequestreview-483095919 it should be noted that whitelist for groups and projects works in gitlab if still on version 1.2.

I spend some hours because I did not realise the doc refers to a version which is not the standard version.
jupyterhub/oauthenticator