Why Laravel "Console::info()" doesn't works, error: "Class 'App\Http\Controllers\Console' not found in MY CONTROLLER"?

I am absolutly new in PHP and in Laravel.

I am working on a Laravel controller class and I have put these 2 line

Console::info('username: ' + $userName); Console::info('password ' + $pswd);

to log what happens in the code.

So my entire controller class is:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;

use GuzzleHttp\Exception\GuzzleException;
use GuzzleHttp\Client;
use Illuminate\Support\Facades\Input;
use function GuzzleHttp\json_encode;
use function GuzzleHttp\json_decode;

use Illuminate\Support\Facades\Artisan;

class LoginBetriviusController extends Controller
{
    //------------------------------------------------------------------------------------
    //metodo richiamato al caricamento della web application - carica la pagina principale
    //------------------------------------------------------------------------------------
    public function index(){
        return view('login');       
    }

    //------------------------------------------------------------------------------------
    //TODO _ implementare chiamata per la LOGIN
    //------------------------------------------------------------------------------------
    public function doLogin(){

        $userName = Input::get('username');
        $pswd = Input::get('password');

        Console::info('username: ' + $userName);
        Console::info('password ' + $pswd);

        return view('dashboard-hotel');
    }
    //------------------------------------------------------------------------------------
    //FINE --- implementare chiamata per la LOGIN
    //------------------------------------------------------------------------------------
}

the prolem is that when enter in this method I am obtaining the following error message when try to execute the first Console::info method:

[Mon Jan 23 17:48:46 2017] PHP Fatal error:  Class 'App\Http\Controllers\Console' not found in C:\Users\Andrea\Documents\Betrivius
\WorkSpace\betriviusExtranet\app\Http\Controllers\LoginBetriviusController.php on line 34

Why? What am I missing? How can I fix this issue?