Build an endpoint to create the invoice in Stripe

[devksingh4]

Example on how to do this is for create membership checkout session.

Customer will go to an ACM-controlled link with an invoice ID, we will look at the invoice ID and pull out the customer, and create a stripe checkout session and send them there.

[devksingh4]

When you create the checkout session, in the payment intent metadata, you should pass in as metadata the ACM org and email domain as metadata keys
stripeAchAcmOrg and stripeAchEmailDomain.