Retrieves a schedule rotation user

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

{
  "data": {
    "id": "4ffd0176-3157-430b-bc8f-7eeca590b989",
    "type": "schedule_rotation_users",
    "attributes": {
      "schedule_rotation_id": "8fdfbd1f-2ea7-4298-8289-18ab8e39ad2f",
      "user_id": 857,
      "position": 2,
      "created_at": "2026-01-21T11:22:28.900-08:00",
      "updated_at": "2026-01-21T11:22:28.907-08:00"
    }
  }
}