How to login to USC FAST to update Financial information?

Hi,

I Applied through the common app and USC sent me an email to provide more financial documents.
But for that I need to login to USC FAST.
https://financialaid.usc.edu/general/help-contact-us-general.html

How do I open an account here and connect with my application.

Also checking with USC Office.

Thanks
Andy

I called USC and they say not to worry till admissions are done!