when i run this code
import discord
import os
client = discord.Client()
@client.event
async def on_ready():
print('We have logged in as {0.user} '.format(client))
@client.event
async def on_message(message):
if message.author == client.user:
return
if message.content.startswith('mango hello'):
await message.channel.send('Hello!')
client.run(os.getenv(''))
i get this error message
Traceback (most recent call last):
File "main.py", line 18, in <module>
client.run(os.getenv('ODQ2NzU0OTgzMzc3MzcxMjI4.YK0IBw.BFsCEE_RY22U9LdTDo1Nwrgh2kY'))
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py", line 723, in run
return future.result()
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py", line 702, in runner
await self.start(*args, **kwargs)
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py", line 665, in start
await self.login(*args, bot=bot)
File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/client.py", line 511, in login
await self.http.static_login(token.strip(), bot=bot)
AttributeError: 'NoneType' object has no attribute 'strip'
how do i fix this?

