CruGlobal/conf-registration-api — pull request #200 by ryancarlson (2014-06-26 22:32:11+00:00)
Title: Require at least one full/creator permission

I built this logic on the front end, but it might be a good idea to have it on the backend as well.

Return an error if attempting to delete or demote a user's privileges if they are the last FULL or CREATOR for an event. There must be at least one user with FULL permissions.