[C#] feat: Allow passing custom credentials factory to CloudAdapter (#…

…2166)

## Linked issues

closes: #2130

## Details

Added an additional constructor to CloudAdapter that allows passing a
custom credentials factory to CloudAdapter. This enables using an
alternative credentials factory, like
FederatedServiceClientCredentialsFactory, instead of it being hardcoded
to the ConfigurationServiceClientCredentialFactory.

## Attestation Checklist

- [x] My code follows the style guidelines of this project
- [x] I have checked for/fixed spelling, linting, and other errors
- [x] I have commented my code for clarity
- [x] I have made corresponding changes to the documentation (updating
the doc strings in the code is sufficient)
- [x] My changes generate no new warnings
- [x] New and existing unit tests pass locally with my changes

dotnet/packages/Microsoft.TeamsAI/Microsoft.TeamsAI/Application/TeamsAdapter.cs

@@ -58,6 +58,29 @@ public TeamsAdapter(
             CredentialsFactory = new ConfigurationServiceClientCredentialFactory(configuration);
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TeamsAdapter"/> class.
+        /// </summary>
+        /// <param name="configuration">The <see cref="IConfiguration"/> instance.</param>
+        /// <param name="credentialsFactory">The <see cref="ServiceClientCredentialsFactory"/> instance.</param>
+        /// <param name="httpClientFactory">The <see cref="IHttpClientFactory"/> this adapter should use.</param>
+        /// <param name="logger">The <see cref="ILogger"/> implementation this adapter should use.</param>
+        public TeamsAdapter(
+            IConfiguration configuration,
+            ServiceClientCredentialsFactory credentialsFactory,
+            IHttpClientFactory? httpClientFactory = null,
+            ILogger? logger = null) : base(
+                new ConfigurationBotFrameworkAuthentication(configuration,
+                    credentialsFactory: credentialsFactory,
+                    httpClientFactory: new TeamsHttpClientFactory(httpClientFactory),
+                    logger: logger),
+                logger)
+        {
+            HttpClientFactory = new TeamsHttpClientFactory(httpClientFactory);
+            Configuration = configuration;
+            CredentialsFactory = credentialsFactory;
+        }
+
         /// <inheritdoc />
         public new async Task ProcessAsync(HttpRequest httpRequest, HttpResponse httpResponse, IBot bot, CancellationToken cancellationToken = default)
         {