Specify that the pivot table has creation and update columns.

def with_timestamps(self, created_at=None, updated_at=None):
        """
        Specify that the pivot table has creation and update columns.
        """
        if not created_at:
            created_at = self.created_at()

        if not updated_at:
            updated_at = self.updated_at()

        return self.with_pivot(created_at, updated_at)