如何在discord.py rewrite中获取对特定消息有反应的每个成员的列表？

Question

该代码应该返回一条消息，告诉您添加了哪个反应以及发送该反应的用户。

import discord
import random
from discord.ext import commands

client = commands.Bot(command_prefix = 'cr!')

##Main program

#Bootup
@client.event
async def on_ready():
    print('bot online')


#Reactions
@client.event
async def on_reaction_add(reaction, user):
    channel = reaction.message.channel
    await client.send_message(channel, '{} has added {} to the message: {}'.format(user.name,reaction.emoji))



client.run("{hid the token}")

显示为输出的错误是：

Traceback (most recent call last):
  File "C:\Users\titif\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\client.py", line 270, in _run_event
    await coro(*args, **kwargs)
  File "C:\Users\titif\Desktop\Discord bot\Fight em .py", line 20, in on_reaction_add
    await client.send_message(channel, '{} has added {} to the message: {}'.format(user.name,reaction.emoji))
AttributeError: 'Bot' object has no attribute 'send_message'