User Instance
GET /api/users/174/?format=api
{
"username": "ehssan",
"gravatar": "//www.gravatar.com/avatar/60227516f93b619d7fef4dfdcbdb9d90?d=wavatar",
"has_key": false
}GET /api/users/174/?format=api
{
"username": "ehssan",
"gravatar": "//www.gravatar.com/avatar/60227516f93b619d7fef4dfdcbdb9d90?d=wavatar",
"has_key": false
}