Muhamad Danang Priambodo

Hi Mike, To make it work, you can just create an extended interface. For instance, we can add "external_id" like this: interface ExtendedInvoiceCallback extends InvoiceCallback { external_id: string; } Now...

> > Hi Mike, To make it work, you can just create an extended interface. For instance, we can add "external_id" like this: interface ExtendedInvoiceCallback extends InvoiceCallback { external_id: string;...