Discord.py重写get_member()函数，对除bot之外的所有用户返回None

import discord
from discord.ext import commands

bot = commands.Bot(command_prefix='!')

@bot.event
async def on_message(message):
    # 检查消息是否为命令
    if message.content.startswith('!get_member'):
        # 获取服务器成员列表
        guild = message.guild
        members = guild.members
        
        # 遍历成员列表，排除bot用户
        for member in members:
            if not member.bot:
                # 返回除bot之外的用户对象
                return member
        
        # 如果没有除bot之外的用户，则返回None
        return None

bot.run('YOUR_BOT_TOKEN')