A Little bit confused - Uploading documents before appointment

Hi All,
I have my biometrics appointment next week and I just tried to log into my application to upload supporting documents such as Degree Certificate, Passport and References, but there is no where to do this even though I seem to remember a part of the application that allowed me to do this. I did not pay for any document scanning services so I am a bit confused. Do I need to upload any documents before going for my appointment?

Thanks in advance for your help.

Do you have a UKVCAS login ID/password?
You can upload documents for free yourself, not sure what the systems issue is.
The scanning service needs to be booked with your appointment I believe.

I only booked the appointment. I am not sure I have a separate UKVAS password and log in. The website I am checking is https://visas-immigration.service.gov.uk/

There's a login on the UKVCAS website: https://www.ukvcas.co.uk/
I believe you upload there. otherwise you need to check with them what to do: https://www.ukvcas.co.uk/help-support

You are very right...I have just found my log in details. Thank you.