优化客服统计功能

AllBase/Model/Result/ShopLoginInfo.cs

@@ -199,7 +199,7 @@ namespace AllBase.Model.Result
         public string RefreshToken { get; set; } = "";
         public string AppKey { get; set; } = "";
         public DateTime ExpiresTime { get; set; }
-        public DateTime AddTime { get; set; }
+        public DateTime AddTime { get; set; } = DateTime.MinValue;
         public string ApiAuthStatus { get; set; } = "未授权";
     }