new_contents: class User(object):
      _id = None
      _first_name = None
      _last_name = None
      _email = None
  
      def __init__(self, id = "", first_name = "", last_name = "", email = ""):
          self._id = id
          self._first_name = first_name
          self._last_name = last_name
          self._email = email
  
subject: add User object