curl --request POST \
  --url https://api.hyperline.co/v1/customers/{id}/credits/{productId}/topup \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "credit_count": 32,
  "expires_at": "<string>"
}'

{
  "id": "cdt_BPZ19obsBS2qyo",
  "product_id": "itm_3kXODDF42QXtnL",
  "price": {
    "id": "pri_0Jv8EbMDOGsHcn",
    "amount": 20000,
    "pack_size": 120
  },
  "customer_id": "cus_Typ0px2W0aiEtl",
  "payment_method_id": "pm_1xMpj5bwRqN7LM",
  "invoice_id": "inv_1eTaiytfA0i2Va",
  "event_id": "<string>",
  "expires_at": "<string>",
  "type": "topup",
  "source": "api",
  "amount_excluding_tax": 123,
  "credit_count": 32,
  "balance_after": 2000,
  "created_at": "2024-10-13T07:00:01.860Z",
  "updated_at": "2024-10-13T07:00:01.860Z"
}