Python 永远不等待client.login

我得到了这个错误：

在最后一行执行

client.run（TOKEN）

而不是

client.login（TOKEN）

import discord

TOKEN = "my token"



class MyClient(discord.Client):
    async def on_ready(self):
        print('Logged on as', self.user)

    async def on_message(self, message):
        # don't respond to ourselves
        if message.author == self.user:
            return

        if message.content == 'cocacola':
            await message.channel.send('cocacola espuma')

client = MyClient()
client.login(TOKEN)

Warning (from warnings module):
  File "C:/Users/Aorus/AppData/Local/Programs/Python/Python36/discbot.py", line 20
    client.login(TOKEN)
RuntimeWarning: coroutine 'Client.login' was never awaited