@classmethod
def Id(cls, id):
    """Class method to create the class from an ID
        
        :param id: A slack ID, e.g. T1NASNDSP
        :return: A class instance of whatever class this is mixed in to
        """
    cls_instance = cls(dict(id=id))
    cls_instance._repr_keys.add('id')
    return cls_instance
