How to register a card for future payments

[maneesh-john]

I have used this demo to integrate hyperpay with my project. But I have to register cards without payment and then use the generated token for future payments. I tried a lot of but I'm unable to get the resourcePath when i use transaction.registerService as mentioned in the documentation. Even though the success handler is called, resourcePath is missing. It will be very helpful if you could provide any details about this feature.