无法在我的for循环discord.py重写中使用add_roles

import discord
import asyncio

client = discord.Client()

@client.event
async def on_ready():
    guild = client.guilds[0]  # 获取第一个服务器
    member = guild.get_member(1234567890)  # 获取要添加角色的成员

    roles = ["Role1", "Role2", "Role3"]  # 要添加的角色列表

    for role_name in roles:
        role = discord.utils.get(guild.roles, name=role_name)  # 获取角色对象
        await asyncio.sleep(1)  # 延迟1秒
        await member.add_roles(role)  # 添加角色

client.run('YOUR_BOT_TOKEN')