'Retrieves a list of messages assigned to the User.  This backend never
stores anything, so all_retrieved is assumed to be False.'

def _get(self, *args, **kwargs):

    queryset = self._get_messages_queryset()
    if (queryset is None):
        return ([], False)
    messages = []
    for user_message in queryset:
        messages.append(Message(constants.INFO, user_message.message))
    return (messages, False)
