User Instance
GET /api/users/126/?format=api
{
"username": "dopicardo",
"gravatar": "//www.gravatar.com/avatar/8a92c135422bce810a9f44709c1d8a68?d=wavatar",
"has_key": false
}GET /api/users/126/?format=api
{
"username": "dopicardo",
"gravatar": "//www.gravatar.com/avatar/8a92c135422bce810a9f44709c1d8a68?d=wavatar",
"has_key": false
}