techknowlogick 7a8e299c7c migrate gplus to google oauth2 provider ()
* migrate gplus to google oauth2 provider. this still provides support for old gplus connections.

* Update models/oauth2.go

Co-Authored-By: Antoine GIRARD <sapk@users.noreply.github.com>

* make vendor
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app_identity_service.pb.go migrate gplus to google oauth2 provider ()
app_identity_service.proto migrate gplus to google oauth2 provider ()