Retrieves a schedule rotation user

curl --request GET \
  --url https://api.rootly.com/v1/schedule_rotation_users/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "4f7ff74d-0221-484b-ae23-3e2a6a5d3ec6",
    "type": "schedule_rotation_users",
    "attributes": {
      "schedule_rotation_id": "87fd4884-44ba-49a6-8622-707fbc04e0bd",
      "user_id": 838,
      "position": 2,
      "created_at": "2026-01-13T22:47:58.548-08:00",
      "updated_at": "2026-01-13T22:47:58.554-08:00"
    }
  }
}