How to resolve payment issue on my ecommerce site?

Hello, I really need help on this one i can’t wrap my mind around it, I have a problem with the payement, I tried to buy something from my site to see if it’s working, but i get this error ( unauthorized request. bad or missing credentials) i tried it with two credit cards but i get the same error, the credit cards are working fine and the bank said that the problem isn’t coming from them. Please help store url (www.forevergenerics.com). Thank you in advanced.

Hey, @TarikGhzali ! Thanks for reaching out. It’s great to see you’re doing a test order - finding issues like this is exactly why it’s recommended to do so. So let’s troubleshoot this so that your customers don’t have any problems placing orders.

Due to the error you’re receiving, it sounds to me like your payment gateway hasn’t been properly integrated. Which payment gateway are you using?