User Instance
GET /api/users/120/?format=api
{
"username": "ragnaren",
"gravatar": "//www.gravatar.com/avatar/280a0c7aaa9d058d6726c8467f566bfb?d=wavatar",
"has_key": false
}GET /api/users/120/?format=api
{
"username": "ragnaren",
"gravatar": "//www.gravatar.com/avatar/280a0c7aaa9d058d6726c8467f566bfb?d=wavatar",
"has_key": false
}