Updates

Author: guardrex

aspnetcore/blazor/security/webassembly/standalone-with-identity/qrcodes-for-authenticator-apps.md

@@ -160,6 +160,15 @@ At the top of the `CookieAuthenticationStateProvider.cs` file, add a `using` sta
 using System.Text.Json.Serialization;
 ```
 
+Inject an `ILogger<CookieAuthenticationStateProvider>` to log exceptions in the class:
+
+```diff
+- public class CookieAuthenticationStateProvider(IHttpClientFactory httpClientFactory) 
+-     : AuthenticationStateProvider, IAccountManagement
++ public class CookieAuthenticationStateProvider(IHttpClientFactory httpClientFactory, ILogger<CookieAuthenticationStateProvider> logger) 
++     : AuthenticationStateProvider, IAccountManagement
+```
+
 In the <xref:System.Text.Json.JsonSerializerOptions>, add the <xref:System.Text.Json.JsonSerializerOptions.DefaultIgnoreCondition> option set to <xref:System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull?displayProperty=nameWithType>, which avoids serializing null properties:
 
 ```diff