Visit
www.imsu.du.ng/portal, Under the 'Student' sign in option to the left, click on the 'Register' button and complete the form. When successful, a verification message is sent to email address make sure to check even your 'Spam mail/box'.
Verify your account/email through the link, and log in again following the promptings or via the same steps as above, this time, choosing the 'Log In' option. Good luck!