User Instance
GET /api/users/123/?format=api
{
"username": "Slowmolosse",
"gravatar": "//www.gravatar.com/avatar/245c532817fc027fa6b733d13ad0fc80?d=wavatar",
"has_key": false
}GET /api/users/123/?format=api
{
"username": "Slowmolosse",
"gravatar": "//www.gravatar.com/avatar/245c532817fc027fa6b733d13ad0fc80?d=wavatar",
"has_key": false
}