post https://earthnode-dev.vopay.com/api/v2/google-pay/set-my-google-pay
This endpoint allows you to identify a Google Pay credit card as belonging to the VoPay account holder. Optionally, you can use this endpoint to identify a Google Pay credit card as being the VoPay account holder's default Google Pay credit card. Note, a VoPay account can only have one default Google Pay credit card.