curl --request POST \
  --url https://api.crevio.co/v1/refunds \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "order": "<string>",
  "amount": 123,
  "reason": "<string>",
  "notes": "<string>"
}
'

{
  "id": "<string>",
  "object": "<string>",
  "amount": 123,
  "currency": "<string>",
  "reason": "<string>",
  "status": "<string>",
  "created_at": "<string>",
  "provider": "<string>",
  "metadata": {},
  "order": "<string>"
}