add TOC

Author: AmandaAZ

support/entra/entra-id/app-integration/serilog-protected-web-api-authentication-authorization-errors.md

@@ -48,7 +48,7 @@ Change the following information in the `AzureAd` section in the **appsettings.j
   },
 ```
 
-## Step 3: Change the sample application code
+### Step 3: Change the sample application code
 
 Change the `ValidAudiences` and `ValidIssuers` properties of the [TokenValidationParameters](/dotnet/api/microsoft.identitymodel.tokens.tokenvalidationparameters) class in the **Program.cs** file.
 

support/entra/entra-id/toc.yml

@@ -65,6 +65,8 @@
         href: app-integration/repeat-login-prompts-in-msal-ios-app.md
       - name: Infinite sign-in loop issue with ASP.NET applications
         href: app-integration/asp-dot-net-application-infinite-sign-in-loop.md
+      - name: Troubleshoot protected Web API authentication or authorization errors with Serilog
+        href: app-integration/serilog-protected-web-api-authentication-authorization-errors.md
 
 
   - name: Troubleshoot adding apps