---
layout: default
navsection: api
+navmenu: Concepts
title: Authentication
navorder: 2
---
table(table table-bordered table-condensed).
|Name|Type|Description|
-|modified_by_client|string|ID of API client|
-|modified_by_user|string|ID of authenticated user|
+|modified_by_client_uuid|string|ID of API client|
+|modified_by_user_uuid|string|ID of authenticated user|
h2. Authorizing a client application