title: Remove user from Google Compute Engine instances
body: <p>I'm using gcutil to access Google Compute Engine instances.</p>
  
  <p>I noticed that when I spin up a new instance, the new instance has a user that I used on a previous machine in this project.</p>
  
  <p>I want to remove that user - not just from this machine, which of course I can do via the normal *nix processes, but, I want to ensure it is not used for any future Compute Engine instances.</p>
  
  <p>How can I do this? </p>