curl --request GET \
  --url https://conta-public-api.kiwify.com/v1/refunds \
  --header 'X-PoP-Challenge: <api-key>' \
  --header 'X-PoP-Format: <api-key>' \
  --header 'X-PoP-Signature: <api-key>' \
  --header 'x-access-id: <api-key>'

{
  "refunds": [
    {
      "created_at": "2023-11-07T05:31:56Z",
      "details": {
        "amount_in_cents": 123,
        "message_to_payer": "<string>"
      },
      "id": 123,
      "status": "pending",
      "transaction_id": 123,
      "updated_at": "2023-11-07T05:31:56Z",
      "beneficiary": {
        "pix_key": "<string>",
        "name": "<string>",
        "tax_id": "<string>",
        "account_type": "checking_account"
      },
      "cancelled_at": "2023-11-07T05:31:56Z",
      "external_reference_id": "<string>"
    }
  ],
  "next_cursor": "<string>"
}