Can I buy Amazon Prime with coupons?

I wanted to buy this for Twitch Prime but with payment options nowhere is that you can pay with coupons. Is that possible or not? I have no account / credit card and I do not want to unnecessarily buy a ticket.

"Gift Certificates and Gift Cards can't be redeemed for… Paying for Amazon Prime membership."

https://www.amazon.de/...ype=modal/

You need an account sometime anyway, because you do not get around today.