I can create subscriptions, but I can't figure out how to update a subscription so that it uses a new credit card.
This is what I've tried: (assuming there is already an existing client, payment and subscription)
update client like this:
paymill.clients.update(clientId, { payment: payment.id }, callback);
I get this error:
Error: Identifier,payment
Exception: Api_Exception_InvalidParameter
Which calls do I need to make to achieve this?
Paymill has updated the api and you can now make this request which can be used to update cc details on a subscription.
First create a payment and then update the subscription with the new payment id.
curl -X PUT https://api.paymill.com/v2/subscriptions/<SubscriptionId> -u <ApiKey>: -d payment=<PaymentId>