To modify an account, use the command gchaccount:
gchaccount [-n account_name] [-d description] [—addProject(s) [+ | -]project_name [, [+ | -]project_name...]] [—addUser(s) [+ | -]user_name [, [+ | -]user_name...]] [—addMachine(s) [+ | -]machine_name [, [+ | -]machine_name...]] [—delProject(s) project_name [,project_name...]] [—delUser(s) user_name [,user_name...]] [—delMachine(s) machine_name [,machine_name...]] [—debug] [-? | —help] [—man] [—quiet] [-v | —verbose] {[-a] account_id}
Example 6. Adding a user to the list of users that share the account
$ gchaccount —addUser dave 1 Successfully created 1 AccountUser