Added the User property to the ChatGptOptions class

src/ChatGptNet/ChatGptClient.cs

@@ -200,6 +200,7 @@ private ChatGptRequest CreateRequest(List<ChatGptMessage> messages, bool stream,
             MaxTokens = parameters?.MaxTokens ?? options.DefaultParameters.MaxTokens,
             PresencePenalty = parameters?.PresencePenalty ?? options.DefaultParameters.PresencePenalty,
             FrequencyPenalty = parameters?.FrequencyPenalty ?? options.DefaultParameters.FrequencyPenalty,
+            User = options.User,
         };
 
     private void UpdateHistory(Guid conversationId, IList<ChatGptMessage> messages, ChatGptMessage message)

src/ChatGptNet/ChatGptOptions.cs

@@ -50,4 +50,12 @@ public class ChatGptOptions
     /// </summary>
     /// <see cref="ChatGptParameters"/>
     public ChatGptParameters DefaultParameters { get; } = new();
+
+    /// <summary>
+    /// Gets or sets the user identification for chat completion, which can help OpenAI to monitor and detect abuse.
+    /// </summary>
+    /// <remarks>
+    /// See <see href="https://platform.openai.com/docs/guides/safety-best-practices/end-user-ids">Safety best practices</see> for more information.
+    /// </remarks>
+    public string? User { get; set; }
 }

src/ChatGptNet/Models/ChatGptRequest.cs

@@ -74,4 +74,12 @@ public class ChatGptRequest
     /// </remarks>
     [JsonPropertyName("frequency_penalty")]
     public double? FrequencyPenalty { get; set; }
+
+    /// <summary>
+    /// Gets or sets the user identification for chat completion, which can help OpenAI to monitor and detect abuse.
+    /// </summary>
+    /// <remarks>
+    /// See <see href="https://platform.openai.com/docs/guides/safety-best-practices/end-user-ids">Safety best practices</see> for more information.
+    /// </remarks>
+    public string? User { get; set; }
 }