Gam to star a folder for a user

[Netzero]

Dear All,

Am a relative newbie to Gam.  Can someone advise on how I can star a folder for a user please?  I run this command on a genuine folder google id.  Then get the below error after the command.

gam user user@acme.com update drivefile  34jerjikkjrandomgoogleid  starred true

ERROR: 34jerjikkjrandomgoogleid is not a valid argument for "gam <users> update drivefile"

Am I missing something basic, I want to star a folder for a certain user basically.

Thanks

[KevinApodaca]

Hi @Netzero for GAM-specific questions you can post in the dedicated Google Group here or in the Google Chat space. 
Instructions for that are here