This template uses Stripe for payments. You need to set up your Stripe account and connect with this template to charge your users and transfer money to restaurants and couriers.
Setup your Stripe account → https://stripe.com
After account creation, you should enter your API keys into your Bubble app, as shown in the screenshot below.
This documentation will help you to get your API keys → https://stripe.com/docs/keys
Also you must connect your Stripe & Bubble app. Add https://bubble.io/poststripeauth link into your redirects parts.