User Instance
GET /api/users/197/?format=api
{
"username": "aaponaa",
"gravatar": "//www.gravatar.com/avatar/30ecf12939c2b8f5fe6194d8e5f1357f?d=wavatar",
"has_key": false
}GET /api/users/197/?format=api
{
"username": "aaponaa",
"gravatar": "//www.gravatar.com/avatar/30ecf12939c2b8f5fe6194d8e5f1357f?d=wavatar",
"has_key": false
}