User Instance
GET /api/users/11/?format=api
{
"username": "Jlzirani",
"gravatar": "//www.gravatar.com/avatar/0da9a8c0b64815f4e907033c92762bf6?d=wavatar",
"has_key": false
}GET /api/users/11/?format=api
{
"username": "Jlzirani",
"gravatar": "//www.gravatar.com/avatar/0da9a8c0b64815f4e907033c92762bf6?d=wavatar",
"has_key": false
}