User Instance
GET /api/users/399/?format=api
{
"username": "Namoor",
"gravatar": "//www.gravatar.com/avatar/1ef41344d8e4ab5fe7f8248390fa3787?d=wavatar",
"has_key": false
}GET /api/users/399/?format=api
{
"username": "Namoor",
"gravatar": "//www.gravatar.com/avatar/1ef41344d8e4ab5fe7f8248390fa3787?d=wavatar",
"has_key": false
}