update app registration

Author: gitName

articles/api-center/includes/api-center-portal-app-registration.md

@@ -13,6 +13,21 @@ ms.custom: Include file
 
 First configure an app registration in your Microsoft Entra ID tenant. The app registration enables the API Center portal to access data from your API center on behalf of a signed-in user.
 
+API Center can set up the app registration automatically, or you can create the app registration manually. 
+
+#### Set up the app registration automatically
+
+To set up the app registration automatically, follow these steps:
+
+1. In the [Azure portal](https://portal.azure.com), navigate to your API center.
+1. In the left-hand menu, select **API Center portal** > **Settings**.
+1. On the **Identity provider** tab, select **Start set up**.
+1. Select **Save + publish**.
+
+#### Set up the app registration manually
+
+If you want to create the app registration manually, follow these steps:
+
 1. In the [Azure portal](https://portal.azure.com), navigate to **Microsoft Entra ID** > **App registrations**.
 1. Select **+ New registration**. 
 1. On the **Register an application** page, set the values as follows:
@@ -23,12 +38,15 @@ First configure an app registration in your Microsoft Entra ID tenant. The app r
         Enter the URI of your API Center portal deployment, in the following form: `https://<service-name>.portal.<location>.azure-api-center.ms`. Replace `<service name>` and `<location>` with the name of your API center and the location where it's deployed, Example: `https://myapicenter.portal.eastus.azure-api-center.ms`.
     1. Select **Register**.
 
-When enabling the API Center portal in the Visual Studio Code extension for API Center, also configure the following redirect URIs. 
+#### Configure additional redirect URIs for VS Code extension
+
+When enabling the API Center portal view in the Visual Studio Code extension for API Center, also configure the following redirect URIs in the app registration:
 
-1. On the **Manage** > **Authentication** page, Select **Add a platform** and select **Mobile and desktop applications**. 
+1. In the [Azure portal](https://portal.azure.com), navigate to your app registration.
+1. On the **Manage** > **Authentication** page, select **Add a platform** and select **Mobile and desktop applications**. 
 1. Configure the following three custom redirect URIs:<br/>
     `https://vscode.dev/redirect`<br/>
     `http://localhost`<br/>
     `ms-appx-web://Microsoft.AAD.BrokerPlugin/<application-client-id>`<br/>
 
-    Replace `<application-client-id>` with the application (client) ID of this app. You can find this value on the **Overview** page. 
+    Replace `<application-client-id>` with the application (client) ID of this app. You can find this value on the **Overview** page of the app registration.