how to add users to a local group

docs/admin-guide/configuration/basic/users_and_groups.md

@@ -68,3 +68,16 @@ To have the group actually configured on a given node, it needs to be added to t
 local_accounts::groups:
   - 'twlhaop'
 ```
+
+## Configure Local Group Members
+Below example adds AD users to a local, already predefined group `dialout` (which is allows to access serial interfaces):
+
+```
+local_accounts::group_defs:
+  dialout:
+     members:
+       - 'lx_test'
+       - 'svcusr-lx_test'
+
+local_accounts::groups:
+  - 'dialout'