diff --git a/api/HelloYou.cs b/api/HelloYou.cs
index c0d59f2..806883a 100644
--- a/api/HelloYou.cs
+++ b/api/HelloYou.cs
@@ -23,7 +23,7 @@ namespace demo.Function
 
             bool isClaimValid = true;
 
-            if (principal == null && !principal.Identity.IsAuthenticated)
+            if (principal == null || !principal.Identity.IsAuthenticated)
             {
                 log.LogWarning("Request was not authenticated.");
                 isClaimValid = false;
@@ -42,4 +42,4 @@ namespace demo.Function
             return new OkObjectResult(responseMessage);
         }
     }
-}
\ No newline at end of file
+}