funcion para obtener el token de microsoft graph para enviar mail

import requests, json, time

def get_token():
    token_url = 'https://login.microsoftonline.com/<tenant_id>/oauth2/v2.0/token'
    token_data = {
	'client_id': '<client_id>',
	'scope': 'https://graph.microsoft.com/.default',
	'client_secret': '<client_secret>',
	'grant_type': 'client_credentials'
    }
    token_request = requests.post(token_url, data=token_data)
    token = json.loads(token_request.text)['access_token']
    return token