new_contents: class UserSet(object):
      _user_set = set()
  
      def __init__(self):
          self.add_user(username , password)  # add your account information
         
  
      @property
      def user_set(self):
          return sorted(self._user_set)
  
      def add_user(self, user, password):
          self._user_set.add((str(user), str(password)))
  
  
  
  if __name__ == '__main__':
      print(UserSet().user_set)
  
subject: Create user.py