User Instance
GET /api/users/345/?format=api
{
"username": "shnsengi",
"gravatar": "//www.gravatar.com/avatar/244e3c3c15c94e9b7d98614bb1f9339b?d=wavatar",
"has_key": false
}GET /api/users/345/?format=api
{
"username": "shnsengi",
"gravatar": "//www.gravatar.com/avatar/244e3c3c15c94e9b7d98614bb1f9339b?d=wavatar",
"has_key": false
}