curl --request POST \
  --url https://app.dilli.studio/api/v1/payment-coupons \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "code": "<string>",
  "value": 123
}
'

{
  "id": "<string>",
  "payment_link_id": "<string>",
  "code": "<string>",
  "value": 123,
  "is_active": true,
  "payment_link": {
    "id": "<string>",
    "name": "<string>"
  },
  "max_redemptions": 123,
  "times_redeemed": 123,
  "expires_at": "2023-11-07T05:31:56Z",
  "created_at": "2023-11-07T05:31:56Z"
}