I refered [this sample code](https://github.com/AzureAD/microsoft-authentication-library-for-python/blob/5b135b2e82d0a8064b226b8ca3d2ff5959070b05/sample/confidential_client_secret_sample.py). I want to let Azure Function to authenticate by Azure Active Directory. I cannot understand how to access to Azure BLOB Storage from Azure Functions using MSAL. How do I configure `scope` and `endpoint` ?