feat(openai): 新增注册用户相关接口

src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteUserExtensions.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Flurl;
+using Flurl.Http;
+
+namespace SKIT.FlurlHttpClient.Wechat.OpenAI
+{
+    public static class WechatOpenAIClientExecuteUserExtensions
+    {
+        /// <summary>
+        /// <para>异步调用 [POST] /v1/user/register 接口。</para>
+        /// <para>REF: https://developers.weixin.qq.com/doc/aispeech/openapi/api/v1/user_register.html </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.UserRegisterResponse> ExecuteUserRegisterAsync(this WechatOpenAIClient client, Models.UserRegisterRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateRequest(request, HttpMethod.Post, "v1", "user", "register")
+                .WithHeader("Client-Id", client.Credentials.ClientId)
+                .WithHeader("Client-Key", client.Credentials.ClientKey);
+
+            return await client.SendRequestWithJsonAsync<Models.UserRegisterResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
+        }
+    }
+}