我如何用json制作一个欢迎机器人？Discord.py

{
  "token": "YOUR_DISCORD_BOT_TOKEN",
  "welcome_message": "欢迎加入我们的服务器！",
  "prefix": "!"
}

import discord
import json

# 读取配置文件
with open('config.json', 'r') as f:
    config = json.load(f)

# 创建机器人客户端
client = discord.Client()

# 当机器人准备就绪时触发的事件
@client.event
async def on_ready():
    print(f'Logged in as {client.user.name}')

# 当有新成员加入服务器时触发的事件
@client.event
async def on_member_join(member):
    # 获取欢迎消息
    welcome_message = config['welcome_message']
    # 发送欢迎消息到指定频道
    channel = discord.utils.get(member.guild.channels, name='general')
    await channel.send(welcome_message)

# 当收到消息时触发的事件
@client.event
async def on_message(message):
    # 忽略机器人自身的消息，避免无限循环
    if message.author == client.user:
        return

    # 处理命令
    if message.content.startswith(config['prefix']):
        command = message.content[len(config['prefix']):].lower()
        if command == 'hello':
            await message.channel.send('Hello, world!')

# 运行机器人
client.run(config['token'])

python bot.py