Flask sample reads secret from env var rather than cli

Author: rayluo

sample/authorization-code-flow-sample/authorization_code_flow_sample.py

@@ -24,14 +24,16 @@
 import json
 import logging
 import uuid
+import os
 
 import flask
 
 import msal
 
 app = flask.Flask(__name__)
 app.debug = True
-app.secret_key = sys.argv[2]  # In this demo, we expect a secret from 2nd CLI param
+app.secret_key = os.environ.get("FLASK_SECRET")
+assert app.secret_key, "This sample requires a FLASK_SECRET env var to enable session"
 
 
 # Optional logging