Refactor API key handling and update token properties

Updated KernelBuilderExtensions.cs to use ApiKeyCredential for OpenAIClient instantiation. Added using directive for System.ClientModel. In SemanticKernelMapperExtensions.cs, aliased ChatMessageContent and updated XML docs. Modified Usage object to use new token count properties.

OllamaApiFacade/Extensions/KernelBuilderExtensions.cs

@@ -1,4 +1,5 @@
-using Microsoft.SemanticKernel;
+using System.ClientModel;
+using Microsoft.SemanticKernel;
 using OpenAI;
 
 namespace OllamaApiFacade.Extensions;
@@ -19,7 +20,8 @@ public static IKernelBuilder AddLmStudio(this IKernelBuilder builder, string mod
  {
  var uri = new Uri(endpoint);
  var openAiClientOptions = new OpenAIClientOptions { Endpoint = uri };
- var openAiClient = new OpenAIClient("none", openAiClientOptions);
+ var apiKeyCredential = new ApiKeyCredential("none");
+ var openAiClient = new OpenAIClient(apiKeyCredential, openAiClientOptions);
 
  builder.AddOpenAIChatCompletion(model, openAiClient);
 

OllamaApiFacade/Extensions/SemanticKernelMapperExtensions.cs

@@ -2,6 +2,7 @@
 using Microsoft.SemanticKernel.ChatCompletion;
 using OllamaApiFacade.DTOs;
 using OpenAI.Chat;
+using ChatMessageContent = Microsoft.SemanticKernel.ChatMessageContent;
 
 namespace OllamaApiFacade.Extensions;
 
@@ -65,7 +66,7 @@ public static ChatResponse ToChatResponse(this StreamingChatMessageContent messa
  }
 
  /// <summary>
- /// Converts a <see cref="ChatMessageContent"/> object into a <see cref="OllamaApiFacade.DTOs.ChatResponse"/> object.
+ /// Converts a <see cref="Microsoft.SemanticKernel.ChatMessageContent"/> object into a <see cref="OllamaApiFacade.DTOs.ChatResponse"/> object.
  /// </summary>
  /// <param name="message">The chat message content to be converted.</param>
  /// <returns>A <see cref="OllamaApiFacade.DTOs.ChatResponse"/> object containing the converted message content.</returns>
@@ -117,9 +118,9 @@ public static CompletionResponse ToCompletionResponse(this ChatMessageContent ch
  ],
  Usage: new Usage
  {
- PromptTokens = chatTokenUsage!.InputTokens,
- CompletionTokens = chatTokenUsage.OutputTokens,
- TotalTokens = chatTokenUsage.TotalTokens
+ PromptTokens = chatTokenUsage!.InputTokenCount,
+ CompletionTokens = chatTokenUsage.OutputTokenCount,
+ TotalTokens = chatTokenUsage.TotalTokenCount
  }
  );
  }