User Instance
GET /api/users/283/?format=api
{
"username": "Makkes",
"gravatar": "//www.gravatar.com/avatar/f1d2da3524ccddc81d8616f705772ed5?d=wavatar",
"has_key": false
}GET /api/users/283/?format=api
{
"username": "Makkes",
"gravatar": "//www.gravatar.com/avatar/f1d2da3524ccddc81d8616f705772ed5?d=wavatar",
"has_key": false
}