I re-read your post and realized I may have answered the wrong question, if I did, I apologize
You should also be able to see a message regarding the removal. Depending on how the deletion happened, you should see one of two messages:
Realm : Deleted User Name role mapping rule '': user = ('user' or 'user1' or 'user2' or 'user3' or 'user4' or 'user5') for when the usernames were removed
Realm , : Values changed from '' to ''