Retrieves a schedule rotation user

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

{
  "data": {
    "id": "a82cbb86-06f5-47a3-87fd-d5abc0ac8376",
    "type": "schedule_rotation_users",
    "attributes": {
      "schedule_rotation_id": "703d506f-0e1e-4d33-88f2-b0d3551c80f1",
      "user_id": 518,
      "position": 2,
      "created_at": "2025-12-04T13:32:24.797-08:00",
      "updated_at": "2025-12-04T13:32:24.807-08:00"
    }
  }
}