GET /api/users/4/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, DELETE, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "username": "Rom1",
    "gravatar": "//www.gravatar.com/avatar/1776f28f9b0c39fbb553c8581a6d5242?d=wavatar",
    "has_key": false
}