Merge pull request #172177 from xpouyat/xpouyat-sept21-identity

Update of the article to use the new Azure.Identity package.

Author: PRMerger7

articles/media-services/latest/integrate-azure-functions-dotnet-how-to.md

@@ -81,7 +81,7 @@ Run the dotnet add package command in the Terminal window to install the extensi
 ```bash
 dotnet add package Azure.Storage.Blobs
 dotnet add package Microsoft.Azure.Management.Media
-dotnet add package Microsoft.Identity.Client
+dotnet add package Azure.Identity
 ```
 
 ## Generated project files

articles/media-services/latest/security-function-app-managed-identity-cli-tutorial.md

@@ -6,7 +6,7 @@ author: IngridAtMicrosoft
 manager: femila
 ms.service: media-services
 ms.topic: tutorial
-ms.date: 05/18/2021
+ms.date: 09/13/2021
 ms.author: inhenkel
 ---
 
@@ -112,34 +112,35 @@ func new --name OnAir --template "HTTP trigger" --authlevel "anonymous"
 
 ## Configure the functions project
 
-### Add items to the .csproj file
+### Install Media Services and other extensions
 
-In the autogenerated “.csproj” file, add the following lines to the first `<ItemGroup>`:
+Run the dotnet add package command in the Terminal window to install the extension packages that you need in your project. The following command installs the Media Services and Azure Identity packages.
 
-```xml
-<PackageReference Include="Microsoft.Azure.Management.Fluent" Version="1.37.0" />
-<PackageReference Include="Microsoft.Azure.Management.Media" Version="3.0.4" />
+```bash
+dotnet add package Microsoft.Azure.Management.Media
+dotnet add package Azure.Identity
 ```
 
 ### Edit the OnAir.cs code
 
 Change the `OnAir.cs` file. Change `subscriptionId`, `resourceGroup`, and `mediaServicesAccountName` variables to the ones you decided upon earlier.
 
-```aspx-csharp
-using System.Threading.Tasks;
+```csharp
+using Azure.Core;
+using Azure.Identity;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.Azure.Management.Media;
+using Microsoft.Azure.Management.Media.Models;
 using Microsoft.Azure.WebJobs;
 using Microsoft.Azure.WebJobs.Extensions.Http;
-using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
-using Microsoft.Azure.Management.Media;
-using Microsoft.Azure.Management.ResourceManager.Fluent.Authentication;
-using Microsoft.Azure.Management.ResourceManager.Fluent;
-using Microsoft.Azure.Management.Media.Models;
+using Microsoft.Rest;
+using System.Threading.Tasks;
 
 namespace MediaServicesLiveMonitor
 {
-    public static class LatestAsset
+    public static class OnAir
     {
         [FunctionName("OnAir")]
         public static async Task<IActionResult> Run(
@@ -154,14 +155,18 @@ namespace MediaServicesLiveMonitor
             {
                 return new BadRequestObjectResult("Missing 'name' URL parameter");
             }
-            
-            var credentials = SdkContext.AzureCredentialsFactory.FromSystemAssignedManagedServiceIdentity(
-                MSIResourceType.AppService,
-                AzureEnvironment.AzureGlobalCloud);
 
-            var subscriptionId = "00000000-0000-0000-000000000000";    // Update
-            var resourceGroup = "<your-resource-group-name>";                                    // Update
-            var mediaServicesAccountName = "<your-media-services-account-name>";                    // Update
+            var credential = new ManagedIdentityCredential();
+            var accessTokenRequest = await credential.GetTokenAsync(
+                new TokenRequestContext(
+                    scopes: new string[] { "https://management.core.windows.net" + "/.default" }
+                    )
+                );
+            ServiceClientCredentials credentials = new TokenCredentials(accessTokenRequest.Token, "Bearer");
+
+            var subscriptionId = "00000000-0000-0000-000000000000";                 // Update
+            var resourceGroup = "<your-resource-group-name>";                       // Update
+            var mediaServicesAccountName = "<your-media-services-account-name>";    // Update
 
             var mediaServices = new AzureMediaServicesClient(credentials)
             {
@@ -174,7 +179,7 @@ namespace MediaServicesLiveMonitor
             {
                 return new NotFoundResult();
             }
-            
+
             return new OkObjectResult(liveEvent.ResourceState == LiveEventResourceState.Running ? "On air" : "Off air");
         }
     }