def created(self, created):
        """Sets the created of this Session.

        Unix timestamp indicating when the session was first created.  # noqa: E501

        :param created: The created of this Session.  # noqa: E501
        :type: datetime
        """
        if self.local_vars_configuration.client_side_validation and created is None:  # noqa: E501
            raise ValueError("Invalid value for `created`, must not be `None`")  # noqa: E501

        self._created = created