There are two ways to do this:
Option 1: The Hub owner connects their account: payments are processed through the general Amexzone Hub checkout process, using the account connected by the owner.
Option 2: Each provider connects their own: each provider sets up their own payment processor, and orders are paid directly through their profile. To use this option, “Use Provider Payment Processors” must be enabled.
In both cases, you need to have an account with the processor you are going to use (Stripe, Square, or PayPal).