You can update your username at any time from the Edit Profile tab in the Account Management section. Follow these steps:
Click Change Username
Enter a new username that is at least five characters long.
Enter your current password.
Click "Update Username".
Update Other Information (if prompted)
You may need to update your address or school/organization details.
Note: Usernames must be unique. If you receive an error message, the username is either too short or already in use. Please choose another username.