Is there a way to restore a user using a submitted pre-chat field as externalId?
Context: The customer does not want contacts to duplicate in their Freshchat account. So in their logged area, they are restoring the user using the
restoreId according to documentation `Restore user. But they want this behavior in their public area as well, and the ideia is to set a pre-chat form, ask for the email and use it as the externalId - of course, it would need a callback from the submit form, so I could search for the restoreId.