curl --request POST \
  --url https://api.atlas.co/functions/v1/refund-payment/{payment_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 123,
  "reason": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "payment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "amount": 123,
  "currency": "<string>",
  "status": "pending",
  "reason": "<string>",
  "created_at": "2023-11-07T05:31:56Z"
}