curl --request GET \
  --url https://api.cal.com/v2/bookings/{bookingUid}/references \
  --header 'Authorization: <authorization>' \
  --header 'cal-api-version: <cal-api-version>'

{
  "status": "success",
  "data": [
    {
      "type": "<string>",
      "eventUid": "<string>",
      "destinationCalendarId": "<string>",
      "id": 123
    }
  ]
}