If you attended a training in the past and created your own username and password and when you try to login you're rejected here's why. When we imported data from Student Information into Canvas we also created accounts that are tied to your courses. The user accounts you created may still exist but they also may not work.
We've seen numerous staff members that have bookmarked the login page which is no longer a correct link. The link you most likely currently have is: https://galion.instructure.com/login/normal but what you should have bookmarked is: https://galion.instructure.com. This will take you via single sign on (SSO) to Google and you authenticate into Canvas using your "stu" account username and password.