List the available topics you can subscribe to.
The following topics are supported:
ready-product-invoiceshappens when an invoice is ready to be paid;
customer-feedhappens when a customer is created;
account-pricing-feedhappens when an account pricing object is changed (e.g. a pricing plan);
customer-pricing-feedhappens when a customer pricing object is changed (e.g. a pricing plan is assigned to a customer);
webhook-testfor testing purposes.