/// <summary>
        /// If Username and password is correct, iuserLogin.Login(loggin, password)==True.
        /// Else Username and password is incorrect, messagebox shows
        /// </summary>
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var loggin   = LoginUserName.Text.ToLower();
            var password = LoginPassword.Password;

            if (valid.Login(loggin, password) && Isadmin.IsChecked == true)
            {
                HomePageAdmin homePageAdmin = new HomePageAdmin();
                this.NavigationService.Navigate(homePageAdmin);
            }
            else if (valid.LoginUser(loggin, password))
            {
                ILogicUser userService = new UserService();//------------------Håller koll på vem som loggar in!
                userService.SetUser(loggin);

                HomePageMechanic homePageMechanic = new HomePageMechanic();
                this.NavigationService.Navigate(homePageMechanic);
            }
            else
            {
                MessageBox.Show(StringTools._inputError, "Error", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
        }