User Instance
GET /api/users/10/?format=api
{
"username": "Haxelion",
"gravatar": "//www.gravatar.com/avatar/0bf6f497de246975cacd4f3a482efa20?d=wavatar",
"has_key": false
}GET /api/users/10/?format=api
{
"username": "Haxelion",
"gravatar": "//www.gravatar.com/avatar/0bf6f497de246975cacd4f3a482efa20?d=wavatar",
"has_key": false
}