You can change your user name and password at any time. The email, which is used for logging in is not editable.
To modify your account details:
IIn the main navigation, select Settings > My Account. The My Account screen opens.
On the My Account screen, edit one or more of the following fields:
Name – your user name
Password – the new password
Passwords must be at least 8 characters long and contain at least one of each of the following: lower case letter, upper case letter, number, and special character.
ConfirmNew Password – confirm the new password that was entered (mandatory if password was modified)