OSF accounts are free to everyone, but you need to login through VCU to affiliate your work with the VCU Institution page.
Use the Sign Up button on the OSF home page.
Then choose 'Login through your institution'
Then select VCU from the pull down menu.
You will then be prompted for your VCU eID and password using the usual VCU branded, CAS authentication screen.
Use the Sign In button on the home page.
Then use the "Login through Your Institution" link.
Select VCU from the Institution pull down menu as above.
Enter your VCU eID and password on the VCU branded, CAS authentication page.
You will then see your Dashboard.