curl --request GET \
  --url https://api.shiftkeeper.io/users/ \
  --header 'x-api-key: <api-key>'

{
  "users": [
    {
      "id": "<string>",
      "name": "<string>",
      "email": "jsmith@example.com",
      "time_zone": "<string>",
      "slack_id": "<string>"
    }
  ],
  "meta": {
    "total": 123,
    "page": 123,
    "per_page": 123
  }
}