CB Paid Subscriptions

Stripe sometimes sends payments with a py_ payment id when the payment method used is not a card payment. This seams mostly to apply to Stripe Checkout. py_ is undocumented however it appears it has the same structure as a ch_ object and can be treated as such.

https://www.joomlapolis.com/forum/cb-paid-subscriptions-support/247589-subscription-refund-stripe-refunds-api-charge-id-or-payment-intent-missing?start=6#341600