Unfortuneately this cannot be done directly.
However you can change your username via MyAccount to whatever name you wish. Please note admins will still see your email address.
Go to https://signin.mygovscot.org/portal/auth.jsp# and login.
Once logged in, please click your name , and select Manage your account.
Select Change Username
Enter your password, the new username you wish to use, and then select Change Username. Select Change Username and your username in CONSUL will also change.