Ability for e-commerce portal to use a Promo code and create subscription in a single API call

[makumar]

The use case requires e-commerce portals to do the following 3 APIs in sequence :
1) Validate the Promo code
2) Create a subscription in Zuora
3) Consume the Promo code

The expectation is that Zuora/Connect should internally call the Consume() API after the Order is created in Step #2.
Or, there should be a separate API which the e-commerce portal can call, and should do the #2 and #3 together.

thank you,

Manoj