Laravel 5.2服务----用户验证Auth相关问题

<?php

namespace App\Http\Controllers;

use Auth;
use Illuminate\Routing\Controller;

class AuthController extends Controller{
    /**
     * 处理登录认证
     *
     * @return Response
     */
    public function authenticate()
    {
        if (Auth::attempt([‘email‘ => $email, ‘password‘ => $password])) {
            // 认证通过...
            return redirect()->intended(‘dashboard‘);
        }
    }
}

if (Auth::once($credentials)) {
    //
}