docs: def add(self, obj):
          """Add a object
              Args:
                  Object: Object will be added
              Returns:
                  Object: Object with id
              Raises:
                  TypeError: If add object is not a dict
                  MultipleInvalid: If input object is invaild
          """
          if not isinstance(obj, dict):
              raise TypeError("Add object should be a dict object")
          obj = self.validation(obj)
          obj["id"] = self.maxId + 1
          obj = self._cast_model(obj)
          self.model.db.append(obj)
  
          if not self._batch.enable.is_set():
              self.model.save_db()
          return obj