User Instance
GET /api/users/6/?format=api
{
"username": "toon",
"gravatar": "//www.gravatar.com/avatar/6f2b301ca323a50164623521f89f8932?d=wavatar",
"has_key": false
}GET /api/users/6/?format=api
{
"username": "toon",
"gravatar": "//www.gravatar.com/avatar/6f2b301ca323a50164623521f89f8932?d=wavatar",
"has_key": false
}