{
  "code": "BadRequestError",
  "message": "{"checked_in":["Checked in can't be blank"]}"
}

{
  "id": "{guest_id}",
  "first_name": "Bob",
  "last_name": "Jones"
}

{
  "id": "{guest_id}",
  "first_name": "Bob",
  "last_name": "Jones",
  "checked_in_status": {
    "checked_in": 1,
    "checked_in_at": "2017-02-23T19:40:20.576Z",
    "checked_out_at": "2017-02-23T19:40:20.576Z"
  }
}