Create Server Using Discord Bot

If we look at the Guild Create event in the discord dev documentation, we see the following:

I have a couple of questions about this. First of all, I am not sure exactly when I can create a server using a bot account. Following the "when a user is initially connecting" section, I attempted to place the server creation into the on_ready function, like so:

import discord
import asyncio

import bot.client.getkey as _getkey
from bot.utils import get_owner

class ImABot(discord.Client):
    async def on_ready(self):
        ts = await self.create_server("test")
        inv = await self.create_invite(ts.default_channel)
        await self.send_message(get_owner()) #get owner simply gets the user who owns the bot, me.
Bot = ImABot()


Bot.run(_getkey.key())

However, I get the following error:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/discord/client.py", line 307, in _run_event
    yield from getattr(self, event)(*args, **kwargs)
  File "/Users/edl/Desktop/ /Programming/Github/Democracy-Bot/demobot/client/client.py", line 22, in on_ready
    inv = await self.create_invite(ts.default_channel)
  File "/usr/local/lib/python3.6/site-packages/discord/client.py", line 2628, in create_invite
    data = yield from self.http.create_invite(destination.id, **options)
AttributeError: 'NoneType' object has no attribute 'id'

I assume this means the server was not created. I hope someone can give me information on when creating a server will work, and whether or not it is possible in the first place. Thanks!