Simple question: How do I authenticate with Graph API with Python app?

Question

I just want to be able to use the Planner API. See code below:

from O365 import Account

credentials = (CLIENT_ID, CLIENT_SECRET)

base_url = "https://graph.microsoft.com"

scopes = [
'User.Read.All',
'offline_access',
'openid',
'profile'
]

account = Account(credentials)

if not account.is_authenticated:
account.authenticate(scopes=scopes)

else:
print("Authenticated")

response = requests.get(f"{base_url}/{version}/{query_parameters}")
print(response)

The output I get is Response 401, even though earlier I did manage to print "Authenticated". I've already registered my app in Azure Portal, and have enabled multi-tenant. My client ID and client secret is also obtained from there. Why am I still getting 401 response error?