laravel 5.1 auth attempt login authenticaton

Hi i am working for one project in laravel 5 and i was with dificult in my authentication login. When i try put my credentials at login never logs and redirect again for the page "login" and never for the page that i want. My table in phpmyadmin called "users" so the use Auth is right. I don't understand because doesn't work. If anyone help me i apreciate alot.

<?php namespace App\Http\Controllers;

use Auth; 

// product é a pasta e o index é a pagina 
class BackendControlador extends Controller {

    public function index() {

    $email = 'email';
    $password = 'password';

    if (Auth::attempt(['email' => $email, 'password' => $password, 'acesso' => 1])) {
             return redirect()->intended('backend/dashboard.index');
        } elseif (Auth::attempt(['email'=> $email, 'password' => $password, 'acesso' => 0])) {
            return redirect()->intended('welcome');
        } else {
            return view('auth/login');
        }
    }

    public function portfolio() { 
        return view('backend/portfolio.index'); 
    }       
}

via Chebli Mohamed