Note the LOGIN attribute

Author: jonels-msft

articles/postgresql/howto-hyperscale-create-users.md

@@ -42,7 +42,7 @@ Permissions for the `citus` role:
 * Execute monitoring functions that may take ACCESS SHARE locks on tables,
   potentially for a long time.
 * [Create PostgreSQL extensions](concepts-hyperscale-extensions.md) (because
-  the role is a member of azure\_pg\_admin).
+  the role is a member of `azure_pg_admin`).
 
 Notably, the `citus` role has some restrictions:
 
@@ -63,7 +63,9 @@ users. To add a user, use the Azure portal interface.
    ![Add role](media/howto-hyperscale-create-users/2-add-user-fields.png)
 
 The user will be created on the coordinator node of the server group,
-and propagated to all the worker nodes.
+and propagated to all the worker nodes. Roles created through the Azure
+Portal have the `LOGIN` attribute, which means they are true users who
+can sign in to the database.
 
 ## How to modify privileges for user role