User Instance
GET /api/users/177/?format=api
{
"username": "babeltich",
"gravatar": "//www.gravatar.com/avatar/998b1ba1eb9194d1a3ed0a59cd929e7f?d=wavatar",
"has_key": false
}GET /api/users/177/?format=api
{
"username": "babeltich",
"gravatar": "//www.gravatar.com/avatar/998b1ba1eb9194d1a3ed0a59cd929e7f?d=wavatar",
"has_key": false
}