Help sending email. Getting an error.

[bbaluyut]

from O365 import Account

credentials = ('xxx', 'xxxx')

account = Account(credentials)
m = account.new_message()
m.to.add('xyz@xyz.com')
m.subject = 'Testing!'
m.body = "George Best quote: I've stopped drinking, but only while I'm asleep."
m.send()

Client Error: 400 Client Error: Bad Request for url: https://graph.microsoft.com/v1.0/me/sendMail | Error Message: /me request is only valid with delegated authentication flow.
Traceback (most recent call last):
  File "e:\Python\Email\oAuth2\sendmail.py", line 17, in <module>
    m.send()
  File "C:\Users\bbaluyut\AppData\Roaming\Python\Python310\site-packages\O365\message.py", line 706, in send
    response = self.con.post(url, data=data)
  File "C:\Users\bbaluyut\AppData\Roaming\Python\Python310\site-packages\O365\connection.py", line 822, in post
    return self.oauth_request(url, 'post', data=data, **kwargs)
  File "C:\Users\bbaluyut\AppData\Roaming\Python\Python310\site-packages\O365\connection.py", line 800, in oauth_request    
    return self._internal_request(self.session, url, method, **kwargs)
  File "C:\Users\bbaluyut\AppData\Roaming\Python\Python310\site-packages\O365\connection.py", line 762, in _internal_request
    raise HTTPError('{} | Error Message: {}'.format(e.args[0], error_message), response=response) from None
requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: https://graph.microsoft.com/v1.0/me/sendMail | Error Message: /me request is only valid with delegated authentication flow.

[alejcas]

It seems the code you paste is not the code you executed and returned this error