appliedCoupon.promotionCode
parameter. If the coupon is valid show the discounted price; otherwise, a relevant error code will be returned by, which you could leverage to present to customers.
Pass valid promo codes when provisioning or updating subscriptions via the API or SDK using the appliedCoupon.promotionCode
parameter.
appliedCoupon.couponId
parameter.appliedCoupon.billingCouponId
parameter.couponId
parameter.