Discount code configuration or coupon code needs to allow for duration and discount amount once a user upgrades to a paid plan.

[glind]

We need to modify the discount code configuration or coupon code system to accommodate two functionalities:

Duration: The discount code needs to specify the duration for which the discount applies after a user upgrades to a paid plan.

Discount Amount: The discount code should define the discount amount (percentage or fixed value) that the user receives on their upgraded plan.