curl --location --request GET '/api/cart/cart/get_coupon_discount?coupon_id=64' \
--header 'Authorization;'
{
"code": 0,
"msg": "ok",
"data": {
"min_order_amount": "100.00",
"coupon_money": "20.00",
"coupon_unit": 1,
"product_price": 0,
"quantity_count": 0,
"discount_money": "20.00",
"errcode": 0,
"message": ""
}
}