构造函数中，遗漏了SysLdapService服务的赋值

Signed-off-by: aquan <1491897341@qq.com>

Admin.NET/Admin.NET.Core/Service/Auth/SysAuthService.cs

@@ -54,6 +54,7 @@ public class SysAuthService : IDynamicApiController, ITransient
         _sysConfigService = sysConfigService;
         _httpContextAccessor = httpContextAccessor;
         _sysOnlineUserService = sysOnlineUserService;
+        _sysLdapService = sysLdapService;
     }
 
     /// <summary>