User Instance
GET /api/users/223/?format=api
{
"username": "Pharma",
"gravatar": "//www.gravatar.com/avatar/3cd8c7149ac5664b9f7eab105ce40ce6?d=wavatar",
"has_key": false
}GET /api/users/223/?format=api
{
"username": "Pharma",
"gravatar": "//www.gravatar.com/avatar/3cd8c7149ac5664b9f7eab105ce40ce6?d=wavatar",
"has_key": false
}