I am using Sapling for my introductory chemistry course. I signed up using my .edu email and my username is mattoxo. After the first day of class, my professor told us our username MUST be our school email address to recieve credit. My username is not my email address, so I need to cancel my current account to register again with the correct username, or find a way to change my username. Are either of those things possible? I can't create a new account without deleting this one because I need to use the same email address.