Zoom meeting with Craig Collins on 8/3/2022:
https://docs.rest.paymentsapi.io/
Charge a Card
JavaScript to get the token.
POST Make a live tokenized card transaction 
https://docs.rest.paymentsapi.io/#14654018-76b6-4b4b-9ecd-a8e89a3b7af7
Make you send savePayer = True
And log the unique reference.
Use the
POST Process a transaction using saved card details
https://docs.rest.paymentsapi.io/#220402de-e5bf-43c5-8a71-7410706c7654
Update Payer
JavaScript to get the token.
POST Add or update a Payers card details via token
https://docs.rest.paymentsapi.io/#c2821a72-08f2-4e38-8722-dabc5dd50821
Credentials.
Business ID / Username: 1692
Password: 8Pf$r_H63Kt
Sandbox URL
url: https://sandbox.rest.paymentsapi.io
url-auth: https://sandbox.auth.paymentsapi.io
Live URL is sandbox URL without “sandbox” i.e. https://rest.paymentsapi.io.