fix 'author' value

Author: Jak-MS

articles/key-vault/general/authentication-requests-and-responses.md

@@ -2,7 +2,7 @@
 title: Authentication, requests and responses
 description: Learn how Azure Key Vault uses JSON-formatted requests and responses and about required authentication for using a key vault.
 services: key-vault
-author: mbaldwin
+author: msmbaldwin
 manager: msmbaldwin
 
 ms.service: key-vault