Confirms an order.
This function changes order status from INITIATED, PENDING, OFFLINE_PENDING to PAID.
Confirming orders with INITIATED or PENDING status triggers an email with the tickets to the buyer (and to additional guests, if provided).
You can only call this method when authenticated as a Wix app or Wix user identity.
Event ID to which the order belongs.
An object representing the available options for confirming an order.