User Instance
GET /api/users/244/?format=api
{
"username": "Olfg",
"gravatar": "//www.gravatar.com/avatar/ebc3e043e16ee402c595b9f6e713a650?d=wavatar",
"has_key": false
}GET /api/users/244/?format=api
{
"username": "Olfg",
"gravatar": "//www.gravatar.com/avatar/ebc3e043e16ee402c595b9f6e713a650?d=wavatar",
"has_key": false
}