Follow the instructions below. They are from Google.


Rename user
Before renaming this user, ask the user to sign out of his or her account. After you rename this user:
  • All contacts in the user's Google Talk chat list are removed.
  • The user might not be able to use chat for up to 3 days.
  • The rename operation can take up to 10 minutes.
  • The user's current address (keiko.satomi@alslib.info) becomes an alias to ensure email delivery.
  • The new name might not be available for up to 10 minutes.