code: def grant(username):
      
      try:
          PolyaxonClient().user.grant_superuser(username)
      except (PolyaxonHTTPError, PolyaxonShouldExitError, PolyaxonClientException) as e:
          Printer.print_error('Could not grant superuser role to user `{}`.'.format(username))
          Printer.print_error('Error message `{}`.'.format(e))
          sys.exit(1)
  
      Printer.print_success(
          "Superuser role was granted successfully to user `{}`.".format(username))
docs: Grant superuser role to a user.
  
      Example:
  
      \b
      ```bash
      $ polyaxon superuser grant david
      ```