User Instance
GET /api/users/379/?format=api
{
"username": "manu.tran",
"gravatar": "//www.gravatar.com/avatar/99670b718e0a06e799eacbcd5f6fa9ce?d=wavatar",
"has_key": false
}GET /api/users/379/?format=api
{
"username": "manu.tran",
"gravatar": "//www.gravatar.com/avatar/99670b718e0a06e799eacbcd5f6fa9ce?d=wavatar",
"has_key": false
}