Error 403: Access Sharepoint using App Credentials in Python

Question

I am trying to access files stored in SharePoint using Python. I have registered the app in Azure Ad and have client_id and client_secret. I have given the read and write permissions however I am still getting 403 error.

I am not really sure as to what I am missing out on. below is the script:

`from office365.sharepoint.client_context import ClientContext
from office365.runtime.auth.client_credential import ClientCredential

site_url = ''
app_principal = {
    'client_id': '',
    'client_secret': ''
}

credentials = ClientCredential(app_principal['client_id'], app_principal['client_secret'])
ctx = ClientContext(site_url).with_credentials(credentials)

web = ctx.web
ctx.load(web)
ctx.execute_query()`