diff --git a/xdks/python/authentication.mdx b/xdks/python/authentication.mdx
index 7f7fb1ca..b55cb748 100644
--- a/xdks/python/authentication.mdx
+++ b/xdks/python/authentication.mdx
@@ -48,6 +48,7 @@ import webbrowser
 # Step 1: Create PKCE instance
 auth = OAuth2PKCEAuth(
     client_id="YOUR_CLIENT_ID",
+    client_secret="YOUR_CLIENT_SECRET",
     redirect_uri="YOUR_CALLBACK_URL",
     scope="tweet.read users.read offline.access"
 )