public object Get(UserRequest request) { //_permissionValidator.VerifyCurrentUserSystemPermission(EnumSystemPermission.EditUsers); if (request == null) { throw new ArgumentNullException("request is null"); } else if(!string.IsNullOrEmpty(request.Id)) { return _userManager.GetUser(request.Id); } else { return _userManager.GetUserList(request.BuildListOptions(), request.UserNameList); } }