Create coupon

curl --request POST \
  --url https://api.shoppex.io/dev/v1/coupons \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "code": "SAVE10",
  "discount_value": 10,
  "discount_type": "PERCENTAGE",
  "max_uses": 100,
  "products_bound": [
    "prod_1"
  ],
  "min_order_amount": 20,
  "max_discount": 50,
  "valid_from": "2026-04-01T00:00:00.000Z",
  "valid_until": "2026-05-01T00:00:00.000Z"
}
'

{
  "data": {
    "id": "coupon_db_1",
    "uniqid": "coupon_1",
    "shop_id": "shop_1",
    "type": "PERCENTAGE",
    "code": "save10",
    "discount": 10,
    "used": 0,
    "max_uses": 100,
    "min_order_amount": 20,
    "max_discount": 50,
    "valid_from": 1711929600,
    "valid_until": 1714521600,
    "is_active": true,
    "created_at": 1711929600,
    "updated_at": 1711929600,
    "products_bound": [
      "prod_1"
    ],
    "products_count": 1
  }
}