When registering on Stanford Online at lagunita.stanford.edu/register, you will be asked to create a custom username for yourself, in addition to providing your email address and desired password for logging into the course site later.
Your unique username displays on your dashboard, in exported grade reports that the instructor runs, and in discussions you post or respond to.
Once you have registered your account and created your custom username, it is not possible to change it.
If you need to change your username, please contact the Course Support team by clicking on the Help tab that displays on the left side of the screen while logged in.
This will enable the team to help you further.