List add-ons

Example response

{
  "data": [
    {
      "id": "add_7n42DGM5Tflk9n8mt7Fhc7",
      "price_id": "pri_7n42DGM5Tflk9n8mt7Fhc7",
      "product_id": "prd_7n42DGM5Tflk9n8mt7Fhc7"
    }
  ]
}