Merge pull request #211540 from vicancy/patch-1

Update reference-rest-api-data-plane.md

Author: prmerger-automator[bot]

articles/azure-web-pubsub/reference-rest-api-data-plane.md

@@ -53,6 +53,8 @@ Like using `AccessKey`, a [JSON Web Token (JWT)](https://en.wikipedia.org/wiki/J
 
 [Learn how to generate Azure AD Tokens](../active-directory/develop/reference-v2-libraries.md)
 
+The credential scope used should be `https://webpubsub.azure.com/.default`.
+
 You could also use **Role Based Access Control (RBAC)** to authorize the request from your server to Azure Web PubSub Service.
 
 [Learn how to configure Role Based Access Control roles for your resource](./howto-authorize-from-application.md#add-role-assignments-on-azure-portal)
@@ -62,4 +64,4 @@ You could also use **Role Based Access Control (RBAC)** to authorize the request
 | Operation Group | Description |
 |-----------------|-------------|
 |[Service Status](/rest/api/webpubsub/dataplane/health-api)| Provides operations to check the service status |
-|[Hub Operations](/rest/api/webpubsub/dataplane/web-pub-sub)| Provides operations to manage the connections and send messages to them. |
+|[Hub Operations](/rest/api/webpubsub/dataplane/web-pub-sub)| Provides operations to manage the connections and send messages to them. |