I'm about to launch a new product.
As a launch offer, I want to give the customer the possibility to preorder my new product - before the official launch - at a special discount.
I'll give this coupon via email and I need the coupon to be unique and valid just for 24H from the date the customer opens the email
This means that the coupon can't have an expiration date, due to the fact that every customer has their own deadline.
Do you know any tool that I can use with Shopify?
If not, do you suggest any workaround?
Thank you :D