CheckLoginIp.php

<?php

namespace App\Listeners;

use App\Mail\UnknownLoginIp;
use Illuminate\Http\Request;
use Illuminate\Auth\Events\Login;
use Illuminate\Support\Facades\Mail;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;

class CheckLoginIp
{
    /**
     * The request instance.
     *
     * @var Illuminate\Http\Request
     */
	protected $request;

    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct(Request $request)
    {
        $this->request = $request;
    }

    /**
     * Handle the event.
     *
     * @param  Login  $event
     * @return void
     */
    public function handle(Login $event)
    {
        $ip = $this->request->ip();
        $user = $event->user;
        
        if ($user->knownIps()->contains($ip)) return;

        $user->saveIp($ip);
        Mail::to($user->email)->send(new UnknownLoginIp($user, $ip));
    }
}