code: public void updateSystemUsers(String[] users) throws InvalidArgument, RuntimeFault, UserNotFound, RemoteException {
          getVimService().updateSystemUsers(getMOR(), users);
      }
docs: Update the list of local system users. The special users 'dcui', 'vpxuser' and 'vslauser' need not be specified.
  They are always reported in the list of system users.
  
  @param users The new list of local system users.
  @throws InvalidArgument
  @throws RuntimeFault
  @throws UserNotFound
  @throws RemoteException