Can I limit a discount to one use per customer?

It is is not possible to limit a discount code to one use per customer because we don't ask customers for their email on cart so a customer can use the same discount multiple times.

Unless “Limit number of times this discount can be used in total” is set to “1”, as the app deletes the discount after usage.

Possible solution is to create bulk discount codes using “bulk discounts generator” app and send each customer 1 unique discount code only.