def send_alliance_update(cls, event):
        users = PushHelper.get_users_subscribed_for_alliances(
            event, NotificationType.ALLIANCE_SELECTION)
        keys = PushHelper.get_client_ids_for_users(users)

        notification = AllianceSelectionNotification(event)
        notification.send(keys)
    def send_alliance_update(cls, event):
        users = PushHelper.get_users_subscribed_for_alliances(event, NotificationType.ALLIANCE_SELECTION)
        keys = PushHelper.get_client_ids_for_users(users)

        notification = AllianceSelectionNotification(event)
        notification.send(keys)