curl --request PUT \
  --url https://api.hyperline.co/v1/customers/{id}/credits/{productId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Credit name",
  "low_count_threshold": 10,
  "auto_topup": {
    "credit_count": 32,
    "amount_excluding_tax": 2000,
    "price_id": "<string>"
  }
}
'

{
  "product_id": "itm_3kXODDF42QXtnL",
  "customer_id": "cus_Typ0px2W0aiEtl",
  "name": "Credit name",
  "current_balance": 2000,
  "low_count_threshold": 10,
  "last_refreshed_at": "2025-11-23T09:00:01.860Z",
  "auto_topup": {
    "credit_count": 32,
    "amount_excluding_tax": null,
    "price_id": null
  },
  "created_at": "2025-10-12T07:00:01.860Z",
  "updated_at": "2025-10-13T10:00:01.860Z"
}