User Instance
GET /api/users/300/?format=api
{
"username": "sidiza",
"gravatar": "//www.gravatar.com/avatar/43f1f8db497bd13db7307bf43da88194?d=wavatar",
"has_key": false
}GET /api/users/300/?format=api
{
"username": "sidiza",
"gravatar": "//www.gravatar.com/avatar/43f1f8db497bd13db7307bf43da88194?d=wavatar",
"has_key": false
}