Retrieves an override shift

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

{
  "data": {
    "id": "49aadb15-e31f-47fe-8037-4289d727f526",
    "type": "shifts",
    "attributes": {
      "schedule_id": "1d6086ca-7176-4e75-a108-e39abc87efde",
      "rotation_id": "7704f9b1-743c-4fc7-847e-282dd72db6b7",
      "user_id": 660,
      "starts_at": "2026-01-08T08:03:49.000-08:00",
      "ends_at": "2026-01-08T16:03:49.000-08:00",
      "is_override": true
    },
    "relationships": {
      "shift_override": {
        "data": null
      },
      "user": {
        "data": {
          "id": "660",
          "type": "users"
        }
      }
    }
  }
}