User Instance
GET /api/users/cern-fsauerbu/?format=api
https://uhepp.org/api/collections/1/?format=api", "https://uhepp.org/api/collections/134/?format=api", "https://uhepp.org/api/collections/118/?format=api" ], "visibility": 30 }{ "username": "cern-fsauerbu", "first_name": "Frank", "last_name": "Sauerburger", "collections": [ "