See how many (and who) users redeemed your promo code during their checkout experience
To view the redemption information on a Promo Code, navigate to VIEW that promotion in your BILLING section of the control center.
Once you're there, click on the Promotion that you're interested in.
At the bottom of the page, you'll see all of the Promotion Codes that have been created under that promotion:
From there, simply click the VIEW button next to the promotion and then you can see the redemptions on the code.
This page is going to display the Stripe Customer ID and the Invoice of the user that redeemed that code. If you're not sure who that user is, simply click on the customer ID number and you can view the billing history for that user inside your community.