如何为运行命令的人而不是每个人设置冷却计时器

Question

我想让冷却时间计时器针对运行命令的特定人员，而不是为每个人提供冷却时间。某些命令可以作为每个人的冷却时间，但是我需要一种将其添加到其他命令的方法，以便可以毫无失败地运行它们，但有人不能只是向其发送垃圾邮件。

last_called = None

async def on_ready(self):
    print('Logged in as')
    print(self.user.name)
    print(self.user.id)
    print('------')
    print('I\'m in the mainframe.')

async def on_message(self, message):
    # check if 10 seconds have passed since the last call
    if MyClient.last_called and DT.datetime.now() < MyClient.last_called + DT.timedelta(seconds=10): #sets a timer on all commands with MyClient.last_called = DT.datetime.now().
        return
        # we do not want the bot to reply to itself
    if message.author.id == self.user.id:
        return

    if message.content.startswith('!discord'):
        channel = client.get_user(message.author.id)
        await channel.send('https://discord.gg/'.format(message))
        MyClient.last_called = DT.datetime.now()