User Instance
GET /api/users/cern-hhanif/?format=api
{
"username": "cern-hhanif",
"first_name": "Hamza",
"last_name": "Hanif",
"collections": [],
"visibility": 30
}GET /api/users/cern-hhanif/?format=api
{
"username": "cern-hhanif",
"first_name": "Hamza",
"last_name": "Hanif",
"collections": [],
"visibility": 30
}