Changes order status to "CONFIRMED" - from "INITIATED, "PENDING", "OFFLINE_PENDING" to "PAID". Previously confirmed orders (with status "PAID" or "FREE") are not changed. Confirming previously "INITIATED" or "PENDING" orders triggers an email with the tickets to the buyer (and to additional guests, if relevant and provided).
You can only call this method when authenticated as a Wix app or Wix user identity.