* support google oauth allowed_groups. unify allowed groups logic
* add role mapping for google oauth
* add documentation
* add addendums
* remove extra isGroupMember
* add to sample ini
* Apply suggestions from code review
Co-authored-by: Gabriel MABILLE <gamab@users.noreply.github.com>
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Co-authored-by: Gabriel MABILLE <gamab@users.noreply.github.com>