feat: Add create() overload in KiotaClientFactory to add authenticati…

…on middleware to the chain

src/http/httpClient/ContinuousAccessEvaluation.cs

@@ -9,9 +9,8 @@ namespace Microsoft.Kiota.Http.HttpClientLibrary
     /// <summary>
     /// Process continuous access evaluation
     /// </summary>
-    internal class ContinuousAccessEvaluation
+    static internal class ContinuousAccessEvaluation
     {
-
         internal const string ClaimsKey = "claims";
         internal const string BearerAuthenticationScheme = "Bearer";
         private static readonly char[] ComaSplitSeparator = [','];

src/http/httpClient/KiotaClientFactory.cs

@@ -61,6 +61,30 @@ public static HttpClient Create(IList<DelegatingHandler> handlers, HttpMessageHa
             return handler != null ? new HttpClient(handler) : new HttpClient();
         }
 
+        /// <summary>
+        /// Initializes the <see cref="HttpClient"/> with the default configuration and authentication middleware using the <see cref="IAuthenticationProvider"/> if provided.
+        /// </summary>
+        /// <param name="authenticationProvider"></param>
+        /// <param name="optionsForHandlers"></param>
+        /// <param name="finalHandler"></param>
+        /// <returns></returns>
+        public static HttpClient Create(BaseBearerTokenAuthenticationProvider authenticationProvider, IRequestOption[]? optionsForHandlers = null, HttpMessageHandler? finalHandler = null)
+        {
+            var defaultHandlersEnumerable = CreateDefaultHandlers(optionsForHandlers);
+            defaultHandlersEnumerable.Add(new AuthorizationHandler(authenticationProvider));
+            int count = 0;
+            foreach(var _ in defaultHandlersEnumerable) count++;
+
+            var defaultHandlersArray = new DelegatingHandler[count];
+            int index = 0;
+            foreach(var handler2 in defaultHandlersEnumerable)
+            {
+                defaultHandlersArray[index++] = handler2;
+            }
+            var handler = ChainHandlersCollectionAndGetFirstLink(finalHandler ?? GetDefaultHttpMessageHandler(), defaultHandlersArray);
+            return handler != null ? new HttpClient(handler) : new HttpClient();
+        }
+
         /// <summary>
         /// Creates a default set of middleware to be used by the <see cref="HttpClient"/>.
         /// </summary>

src/http/httpClient/Middleware/AuthorizationHandler.cs

@@ -24,7 +24,7 @@ public class AuthorizationHandler : DelegatingHandler
     {
 
         private const string AuthorizationHeader = "Authorization";
-        private BaseBearerTokenAuthenticationProvider authenticationProvider;
+        private readonly BaseBearerTokenAuthenticationProvider authenticationProvider;
 
         /// <summary>
         ///  Constructs an <see cref="AuthorizationHandler"/>