Main Access Updates

app/app.py

@@ -42,7 +42,7 @@ app.register_blueprint(canvas_bp)
 @app.route('/')
 def home():
     """Redirect to login if not authenticated, otherwise show home"""
-    if 'user_id' not in session:
+    if 'username' not in session:
         return redirect(url_for('auth.login_page'))
     
     # If user hasn't selected a location yet, redirect to selection