User Instance
GET /api/users/231/?format=api
{
"username": "carlos",
"gravatar": "//www.gravatar.com/avatar/5a699dc10d1cb2f43daa235aea3cb677?d=wavatar",
"has_key": false
}GET /api/users/231/?format=api
{
"username": "carlos",
"gravatar": "//www.gravatar.com/avatar/5a699dc10d1cb2f43daa235aea3cb677?d=wavatar",
"has_key": false
}