Change author and reviewer for sign-in issue article

Updated author and reviewer information in the document.

Author: Nicholak-MS

articles/cost-management-billing/troubleshoot-subscription/troubleshoot-sign-in-issue.md

@@ -3,8 +3,8 @@ title: Troubleshoot Azure subscription sign-in issues
 description: Helps to resolve the issues in which you can't sign in to the Azure portal.
 services: cost-management-billing
 author: Nicholak-MS
-ms.author: nicholak
-ms.reviewer: nicholak
+ms.author: kenday
+ms.reviewer: kenday
 ms.service: cost-management-billing
 ms.subservice: billing
 ms.topic: troubleshooting