You can find this option in the extension settings by following these steps:
Go to the Share (for Forms) or Users Table & Login (for Portals) section
Select the login field.
Enable the Allow users to scan barcodes & QR codes option.
💡Tip
This toggle is applicable to login fields of any type. Barcode scanning can be enabled for any login field, so it doesn’t necessarily have to be a barcode field specifically.