Discord bot.py will not run with await bot.start()

I have been trying to put a command in a separate file in a folder called cogs. I have been trying to find resources however most are for cogs1.0 and an older version of discord.py

In this one I put bot.load_extension() inside async def main() because it wanted to await, and I ran the main with asyncio.

However it still does not work. Below are my codes without the commands

bot.py

import cmath
import asyncio
from colorsys import rgb_to_hls
import math
import os
import discord
import random
from discord.ext import commands
from discord.ext import tasks
from discord.ext.commands import cooldown, BucketType
 
intents = discord.Intents.default()
intents.message_content = True
bot = commands.Bot(command_prefix='-', intents=intents)
bot.remove_command("help")
async def main():
    async with bot:
        await bot.load_extension("cogs.cog_function")
        await bot.start('TOKEN')
asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
asyncio.run(main())
@bot.event
async def on_ready():
    print('We have logged in as {0.user}'.format(bot))
bot.run('TOKEN')

cog_function.py

import math
import discord
from discord.ext import commands
class CogFunction(commands.Cog):
    def __init__(self, bot):
        self.bot = bot
    
    # commands in here
async def setup(bot):
    await bot.add_cog(CogFunction(bot))

It gave me no error, no tracebacks, etc.
The only line in the Terminal is
PS C:\Users\[MY USERNAME]\Desktop\Discord Bot> & C:/Users/[MY USERNAME]/AppData/Local/Programs/Python/Python39/python.exe "c:/Users/[MY USERNAME]/Desktop/Discord Bot/bot.py" with no additional errors or anything

I tried to remove await bot.start('TOKEN') but obviously it did not work, giving me

Unclosed connector
connections: ['[(<aiohttp.client_proto.ResponseHandler object at 0x00000247D2BEB220>, 4735.609)]']
connector: <aiohttp.connector.TCPConnector object at 0x00000247D2BB9400>

I also tried removing bot.run(TOKEN) but it did not work either.

Any help would be greatly appreciated, thanks!

You can't use asyncio.run more than once, behind the scenes, bot.run also uses it, that's why it's called 2 times. To fix it, you can simply move the load_extension into bot.setup_hook which is a new hook that's called before the bot runs:

import discord
from discord.ext import commands
intents = discord.Intents.default()
intents.message_content = True
bot = commands.Bot(command_prefix='-', intents=intents)
bot.remove_command("help")
async def setup_hook():
    await bot.load_extension("cogs.cog_function")
bot.setup_hook = setup_hook
@bot.event
async def on_ready():
    print('We have logged in as {0.user}'.format(bot))
bot.run('TOKEN')