To modify a user, use the command gchuser:
gchuser [-A | -I] [-n common_name] [-F phone_number] [-E email_address] [-p default_project] [-d description] [—debug] [-? | —help] [—man] [—quiet] [-v | —verbose] {[-u] user_name}
Example 6. Activating a user
$ gchuser -A bob Successfully modified 1 User
Example 7. Changing a user's email address
$ gchuser -E "rsmith@cs.univ.edu" bob Successfully modified 1 User