GeoFence REST entry for querying a specific user is missing

Mailing list discussion: http://osgeo-org.1560.x6.nabble.com/Geofence-questions-td5272625.html

Is not possible to query a specific user information (is only possible to delete or update a single user).

Documentation link: http://docs.geoserver.org/stable/en/user/community/geofence-server/rest-userrole.html#rest-usergroup-service-servicename-users