Register with coupon

Hello to all,
I’m looking for a plugin that allows me in addition to generating coupons, to sign up for a site by entering in addition to your name, last name, email and password also a coupon code.
By placing the coupon code linked to a product automatically, the product should be added to the cart to proceed with the purchase.
Can anyone help me find a plugin that allows me to do so or should i ask a developer?

Thanks
Alessio