GET /api/users/5/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, DELETE, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "username": "iTitou",
    "gravatar": "//www.gravatar.com/avatar/ce9ff75c8e7ee267a7bb2499e81f882d?d=wavatar",
    "has_key": false
}