Retrieves a schedule rotation user

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

{
  "data": {
    "id": "a4fc1d21-0352-4f51-b30e-1ec8b00b494a",
    "type": "schedule_rotation_users",
    "attributes": {
      "schedule_rotation_id": "bfe6fb59-a9ab-48c6-ace9-69a43c313bfc",
      "user_id": 937,
      "position": 1,
      "created_at": "2026-02-02T14:28:21.711-08:00",
      "updated_at": "2026-02-02T14:28:21.711-08:00"
    }
  }
}