User Instance
GET /api/users/102/?format=api
{
"username": "Starkn",
"gravatar": "//www.gravatar.com/avatar/d1a69a5784b229d4a1bb83d2f3b6eb31?d=wavatar",
"has_key": false
}GET /api/users/102/?format=api
{
"username": "Starkn",
"gravatar": "//www.gravatar.com/avatar/d1a69a5784b229d4a1bb83d2f3b6eb31?d=wavatar",
"has_key": false
}