Add constructor with AuthenticationPolicy to ChatClient

api/OpenAI.net8.0.cs

@@ -1402,6 +1402,10 @@ public class ChatClient {
         protected internal ChatClient(ClientPipeline pipeline, string model, OpenAIClientOptions options);
         public ChatClient(string model, ApiKeyCredential credential, OpenAIClientOptions options);
         public ChatClient(string model, ApiKeyCredential credential);
+        [Experimental("OPENAI001")]
+        public ChatClient(string model, AuthenticationPolicy authenticationPolicy, OpenAIClientOptions options);
+        [Experimental("OPENAI001")]
+        public ChatClient(string model, AuthenticationPolicy authenticationPolicy);
         public ChatClient(string model, string apiKey);
         public ClientPipeline Pipeline { get; }
         public virtual ClientResult<ChatCompletion> CompleteChat(params ChatMessage[] messages);

api/OpenAI.netstandard2.0.cs

@@ -1265,6 +1265,8 @@ public class ChatClient {
         protected internal ChatClient(ClientPipeline pipeline, string model, OpenAIClientOptions options);
         public ChatClient(string model, ApiKeyCredential credential, OpenAIClientOptions options);
         public ChatClient(string model, ApiKeyCredential credential);
+        public ChatClient(string model, AuthenticationPolicy authenticationPolicy, OpenAIClientOptions options);
+        public ChatClient(string model, AuthenticationPolicy authenticationPolicy);
         public ChatClient(string model, string apiKey);
         public ClientPipeline Pipeline { get; }
         public virtual ClientResult<ChatCompletion> CompleteChat(params ChatMessage[] messages);

src/Custom/Chat/ChatClient.cs

@@ -66,14 +66,37 @@ public partial class ChatClient
     /// <param name="options"> The options to configure the client. </param>
     /// <exception cref="ArgumentNullException"> <paramref name="model"/> or <paramref name="credential"/> is null. </exception>
     /// <exception cref="ArgumentException"> <paramref name="model"/> is an empty string, and was expected to be non-empty. </exception>
-    public ChatClient(string model, ApiKeyCredential credential, OpenAIClientOptions options)
+    public ChatClient(string model, ApiKeyCredential credential, OpenAIClientOptions options) : this(model, OpenAIClient.CreateApiKeyAuthenticationPolicy(credential), options)
+    {
+    }
+
+    // CUSTOM: Added as a convenience.
+    /// <summary> Initializes a new instance of <see cref="ChatClient"/>. </summary>
+    /// <param name="model"> The name of the model to use in requests sent to the service. To learn more about the available models, see <see href="https://platform.openai.com/docs/models"/>. </param>
+    /// <param name="authenticationPolicy"> The authentication policy used to authenticate with the service. </param>
+    /// <exception cref="ArgumentNullException"> <paramref name="model"/> or <paramref name="authenticationPolicy"/> is null. </exception>
+    /// <exception cref="ArgumentException"> <paramref name="model"/> is an empty string, and was expected to be non-empty. </exception>
+    [Experimental("OPENAI001")]
+    public ChatClient(string model, AuthenticationPolicy authenticationPolicy) : this(model, authenticationPolicy, new OpenAIClientOptions())
+    {
+    }
+
+    // CUSTOM: Added as a convenience.
+    /// <summary> Initializes a new instance of <see cref="ChatClient"/>. </summary>
+    /// <param name="model"> The name of the model to use in requests sent to the service. To learn more about the available models, see <see href="https://platform.openai.com/docs/models"/>. </param>
+    /// <param name="authenticationPolicy"> The authentication policy used to authenticate with the service. </param>
+    /// <param name="options"> The options to configure the client. </param>
+    /// <exception cref="ArgumentNullException"> <paramref name="model"/> or <paramref name="authenticationPolicy"/> is null. </exception>
+    /// <exception cref="ArgumentException"> <paramref name="model"/> is an empty string, and was expected to be non-empty. </exception>
+    [Experimental("OPENAI001")]
+    public ChatClient(string model, AuthenticationPolicy authenticationPolicy, OpenAIClientOptions options)
     {
         Argument.AssertNotNullOrEmpty(model, nameof(model));
-        Argument.AssertNotNull(credential, nameof(credential));
+        Argument.AssertNotNull(authenticationPolicy, nameof(authenticationPolicy));
         options ??= new OpenAIClientOptions();
 
         _model = model;
-        Pipeline = OpenAIClient.CreatePipeline(credential, options);
+        Pipeline = OpenAIClient.CreatePipeline(authenticationPolicy, options);
         _endpoint = OpenAIClient.GetEndpoint(options);
         _telemetry = new OpenTelemetrySource(model, _endpoint);
     }

src/Custom/OpenAIClient.cs

@@ -316,18 +316,26 @@ protected internal OpenAIClient(ClientPipeline pipeline, OpenAIClientOptions opt
     [Experimental("OPENAI001")]
     public virtual ContainerClient GetContainerClient() => new(Pipeline, _options);
 
+    internal static AuthenticationPolicy CreateApiKeyAuthenticationPolicy(ApiKeyCredential credential)
+    {
+        Argument.AssertNotNull(credential, nameof(credential));
+        return ApiKeyAuthenticationPolicy.CreateHeaderApiKeyPolicy(credential, AuthorizationHeader, AuthorizationApiKeyPrefix);
+    }
+
     internal static ClientPipeline CreatePipeline(ApiKeyCredential credential, OpenAIClientOptions options)
+    {
+        return CreatePipeline(
+            authenticationPolicy: ApiKeyAuthenticationPolicy.CreateHeaderApiKeyPolicy(credential, AuthorizationHeader, AuthorizationApiKeyPrefix),
+            options);
+    }
+
+    internal static ClientPipeline CreatePipeline(AuthenticationPolicy authenticationPolicy, OpenAIClientOptions options)
     {
         return ClientPipeline.Create(
-            options,
-            perCallPolicies: [
-                CreateAddCustomHeadersPolicy(options),
-            ],
-            perTryPolicies: [
-                ApiKeyAuthenticationPolicy.CreateHeaderApiKeyPolicy(credential, AuthorizationHeader, AuthorizationApiKeyPrefix)
-            ],
-            beforeTransportPolicies: [
-            ]);
+            options: options,
+            perCallPolicies: [CreateAddCustomHeadersPolicy(options)],
+            perTryPolicies: [authenticationPolicy],
+            beforeTransportPolicies: []);
     }
 
     internal static Uri GetEndpoint(OpenAIClientOptions options = null)