User Instance
GET /api/users/187/?format=api
{
"username": "Gargamel",
"gravatar": "//www.gravatar.com/avatar/f927ab5c32644895a1265c6a5e6c4b44?d=wavatar",
"has_key": false
}GET /api/users/187/?format=api
{
"username": "Gargamel",
"gravatar": "//www.gravatar.com/avatar/f927ab5c32644895a1265c6a5e6c4b44?d=wavatar",
"has_key": false
}