The admin endpoints offer no special functionality, users may talk to the public endpoints instead. The only historic use case has been the keystone v2 admin endpoint, but with keystone v3 API, even that is no longer needed. Also drop the attribute for setting an auth version, as keystone only supports v3 now. [0] https://opendev.org/openstack/openstack-chef-specs/src/branch/master/specs/ocata/all/drop-admin-endpoints.rst Change-Id: Id8fa969af80bcb1cb6f3ce743b1861f26c36523f