当有人加入时创建规则协议

我想要一个机器人将新成员设置为只能查看一个频道并且必须就规则达成一致才能使用服务器的角色。我已经写了这个来做到这一点，但我不断收到此错误。

Ignoring exception in on_member_join
Traceback (most recent call last):
  File "C:\Users\ezter\AppData\Local\Programs\Python\Python36\lib\site-packages\discord\client.py", line 307, in _run_event
    yield from getattr(self, event)(*args, **kwargs)
  File "D:\programing\Discord Bots\Osis Nation\Start.py", line 31, in on_member_join
    role = discord.utils.get(bot.roles, name="Default")
  File "C:\Users\ezter\AppData\Local\Programs\Python\Python36\lib\site-packages\discord\client.py", line 296, in __getattr__
    raise AttributeError(msg.format(self.__class__, name))
AttributeError: '<class 'discord.ext.commands.bot.Bot'>' object has no attribute 'roles'

我用这段代码来做到这一点

#Welcomer
@bot.event
async def on_member_join(member):
    print("A member just joined and his name is" + member.name)
    mid = member.id
    role = discord.utils.get(bot.roles, name="Default")
    role3 = discord.utils.get(member.server.roles, id="<479670838648635392>")
    role2 = discord.utils.get(member.server.roles, id="<479692108953944081>")
    await bot.add_roles(member, bot.get_)

    Rules = "1. Do not DM the Owner or any other staff unless they have DMed you first! \n 2. Be kind, \n 3. Use common sense, \n 4. No swearing, \n 5. No racism or bullying, \n 6. No advertising, \n 7. Do not chat in #music Text or Voice channels, \n 8. Do not spam #applications if your application is accepted or denied! This is only to be used for submitting and staff members replying to the application. \n 9. Do not use or abuse bot commands you should not be using! \n 10. Do not @ any staff members unless it is an emergency.  "

    await bot.send_message(bot.get_channel('479685091749134346'), 'Hello <@%s>, Welcome to Osis Nation, please read all the rules carefully' % (mid))
    await bot.send_message(bot.get_channel('479685091749134346'), (Rules))
    await bot.send_message(bot.get_channel('479685091749134346'), 'If you agree write !Agree. If you do not agree write !Decline')

    if member.content.upper().startwith("!Agree"):
        await bot.send_message(bot.get_channel('479685091749134346'), 'You will be redirected to the server in 5 seconds')
        time.sleep(5)

        await bot.remove_roles(member, role)

我用这段代码做到了

    #Welcomer
@bot.event
async def on_member_join(member):
    print("A member just joined and his name is" + member.name)
    mid = member.id
    role = discord.utils.get(member.server.roles, name="Default")
    await bot.add_roles(member, role)

    Rules = "1. Do not DM the Owner or any other staff unless they have DMed you first! \n 2. Be kind, \n 3. Use common sense, \n 4. No swearing, \n 5. No racism or bullying, \n 6. No advertising, \n 7. Do not chat in #music Text or Voice channels, \n 8. Do not spam #applications if your application is accepted or denied! This is only to be used for submitting and staff members replying to the application. \n 9. Do not use or abuse bot commands you should not be using! \n 10. Do not @ any staff members unless it is an emergency.  "

    await bot.send_message(bot.get_channel('479685091749134346'), 'Hello <@%s>, Welcome to Osis Nation, please read all the rules carefully' % (mid))
    await bot.send_message(bot.get_channel('479685091749134346'), (Rules))
    await bot.send_message(bot.get_channel('479685091749134346'), 'If you agree write !Agree. If you do not agree write !Decline')
@bot.event
async def on_message(message):
    if message.content.upper().startswith("!AGREE"):
        await bot.send_message(bot.get_channel('479685091749134346'), 'You will be redirected to the server in 5 seconds')
        time.sleep(5)
        role = discord.utils.get(message.server.roles, name="Default")
        await bot.remove_roles(message.author, role)