For UPS realm we have developer role (besides admin).

We also have a disabled developer user:
https://github.com/aerogear/aerogear-unifiedpush-server/blob/master/servers/auth-server/src/main/webapp/WEB-INF/ups-realm.json#L36-L48

IMO this should be removed, since the role is really what our customers/users want. But just the role!

Nobody will want a user w/ username "developer", especially that KC does not allow changing usernames.

Also, for security reasons, the less pre-defined users, the better!