code: def list_users(self):
      '''list users, each associated with a filesystem folder
      ''' 
      folders = glob('%s/*' %(self.database))
      folders.sort()
      return [self.print_user(x) for x in foldersf list_users(self):
      '''list users, each associated with a filesystem folder
      ''' 
      folders = glob('%s/*' %(self.database))
      folders.sort()
      return [self.print_user(x) for x in folders]
docs: list users, each associated with a filesystem folder