public function behave(TwitterBot $bot)
    {
        $sql = <<<'SQL'
SELECT
*
FROM spymaster_game
WHERE finished = FALSE
AND end_timestamp <= NOW()
SQL;
        $result = Di::getDefault()->getDb()->query($sql);
        while ($game = SpymasterGame::createFromQueryResult($result)) {
            $game->finish($bot);
        }
    }