For the user mgmt we should have CRUD functionality, to "manage" users

• /get
• /get/SomeID
• POST (which is already there: /enroll)
• PUT: update a user (e.g. password........)
• DELETE (kill a user )

Currently we have just login/logout/register

https://github.com/aerogear/aerogear-unified-push-server/blob/master/src/main/java/org/jboss/aerogear/connectivity/rest/security/AuthenticationEndpoint.java