问从角邮政服务传递模型值为null

EN

$scope.loginUser = {
        email: "",
        password: "",
        typeofUser: "ExternalUser"
    }

var onLoginComplete = function (data) {
            console.log(data);
        };

        var onError = function (reason) {
            $scope.error = "Could not fetch the data.";
        };

        DataService.validateUser($scope.loginUser).then(onLoginComplete, onError);

 var baseurl = window.location.protocol + "//" + window.location.host + "/";
            var validateUser = function (model) {
                return $http.post(baseurl + "Account/Login/" + model)
                                .then(function (response) {
                                    return response.data;
                                });
            }

public class LoginViewModel
    {
        [Required]
        [Display(Name = "Email")]
        public string Email { get; set; }

        [Required]
        [StringLength(50, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
        [DataType(DataType.Password)]
        [Display(Name = "Password")]
        public string Password { get; set; }

        [Required]
        public string TypeofUser { get; set; }
    }