Confirms a submission.
You can only confirm a submission that has a PENDING status.
When using forms from the Wix Pricing Plans app, the default submission status is PENDING.
When using forms from the Wix Forms app, the default form submission status is CONFIRMED. You can change the default status for individual submissions using the updateSubmission() method.
You can only call this method when authenticated as a Wix app or Wix user identity.
Submission ID to confirm.