Retrieves a schedule shifts

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

{
  "data": [
    {
      "id": "<string>",
      "type": "shifts",
      "attributes": {
        "schedule_id": "<string>",
        "rotation_id": "<string>",
        "starts_at": "<string>",
        "ends_at": "<string>",
        "is_override": true,
        "is_shadow": true,
        "user_id": 123
      },
      "relationships": {
        "shift_override": {
          "data": {
            "id": "<string>",
            "type": "shift_overrides"
          }
        },
        "user": {
          "data": {
            "id": "<string>",
            "type": "users"
          }
        },
        "assignee": {
          "data": {
            "id": "<string>",
            "type": "<string>"
          }
        }
      }
    }
  ],
  "meta": {
    "current_page": 123,
    "next_page": 123,
    "prev_page": 123,
    "total_count": 123,
    "total_pages": 123,
    "next_cursor": "<string>"
  }
}