cancelPaymentIntent
Cancels a PaymentIntent.
If the cancel request succeeds, PaymentIntentCallback.onSuccess will be called with the updated PaymentIntent object with status CANCELED. If the cancel request fails, PaymentIntentCallback.onFailure will be called with an error.
See https://stripe.com/docs/terminal/payments/refunds.
Parameters
intent
The PaymentIntent to be canceled
callback
The PaymentIntentCallback that should be called upon completion