curl --request POST \
  --url https://api.zenskar.com/payments/{payment_id}/refund \
  --header 'Content-Type: application/json' \
  --header 'organisation: <api-key>' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "writeoff_invoices": true,
  "connector": {
    "name": "<string>",
    "reference_id": "<string>"
  },
  "refund_payment_part_amounts": [
    {
      "invoice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "amount": 123
    }
  ],
  "refund_amount": 123,
  "description": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}