Add attributes to response from GET /users

[bl4yzer]

I am trying to get all user information including their groups and permissions. The response from GET /users doesn't include this detail. In order to retrieve this information it looks like i'd need to query GET /users/{user_id} for every user. Considering there are 100s of users this would quickly become a problem in terms of performance.

Is there anything I can do to get this information in the response?