Enable separating users into groups for omniAuth authentication

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Problem to solve

If a GitLab instance is available to everyone in let's say the gSuite organization to signup and login, but not everyone in the organization would need to have a gitlab account/license, so it would be nice to be able to limit SignUps/Logins to certain groups in GitLab. Similar to LDAP user_filter

OmniAuth doc

Links / references

ZD

Edited by 🤖 GitLab Bot 🤖