From 62cfb4f920857c307b13f7b730c7456ee58a3c55 Mon Sep 17 00:00:00 2001
From: Ryan Liang <jiallian@amazon.com>
Date: Wed, 23 Aug 2023 16:29:31 -0700
Subject: [PATCH] Add comment for authentication failure in obo authenticator

Signed-off-by: Ryan Liang <jiallian@amazon.com>
---
 .../org/opensearch/security/http/OnBehalfOfAuthenticator.java    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main/java/org/opensearch/security/http/OnBehalfOfAuthenticator.java b/src/main/java/org/opensearch/security/http/OnBehalfOfAuthenticator.java
index 93833c5c36..8e9f29f50a 100644
--- a/src/main/java/org/opensearch/security/http/OnBehalfOfAuthenticator.java
+++ b/src/main/java/org/opensearch/security/http/OnBehalfOfAuthenticator.java
@@ -198,6 +198,7 @@ private AuthCredentials extractCredentials0(final RestRequest request) {
             }
         }
 
+        // Return null for the authentication failure
         return null;
     }