You can log into the InformerOnline app using the same login credentials as the online application.
You can also access your online user profile via Settings > Users > 'App' Tab and scan the QR code there. The QR code in InformerOnline contains the login details of your account.
Note: The QR code is only available for your own user and is not available for accountants. Therefore, you can only see your own QR code and not those of other users.