User Instance
GET /api/users/278/?format=api
{
"username": "T4g1",
"gravatar": "//www.gravatar.com/avatar/964c7f5f438f818a3015a9b99c952dec?d=wavatar",
"has_key": false
}GET /api/users/278/?format=api
{
"username": "T4g1",
"gravatar": "//www.gravatar.com/avatar/964c7f5f438f818a3015a9b99c952dec?d=wavatar",
"has_key": false
}