User Instance
GET /api/users/215/?format=api
{
"username": "Jean-Mi",
"gravatar": "//www.gravatar.com/avatar/eabfa9191e8d55f310bdb78b3e11158b?d=wavatar",
"has_key": false
}GET /api/users/215/?format=api
{
"username": "Jean-Mi",
"gravatar": "//www.gravatar.com/avatar/eabfa9191e8d55f310bdb78b3e11158b?d=wavatar",
"has_key": false
}