monica/app/Providers/EventServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\Facades\Event;
use App\Http\Controllers\Auth\Validate2faController;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;

class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        \PragmaRX\Google2FALaravel\Events\LoginSucceeded::class => [
            \App\Listeners\LoginSucceed2fa::class,
        ],
        \Illuminate\Auth\Events\Login::class => [
            \App\Listeners\LoginListener::class,
        ],
        \App\Events\RecoveryLogin::class => [
            \App\Listeners\RecoveryLoginListener::class,
        ],
        \Illuminate\Foundation\Events\LocaleUpdated::class => [
            \App\Listeners\LocaleUpdated::class,
        ],
        \Illuminate\Auth\Events\Registered::class => [
            \Illuminate\Auth\Listeners\SendEmailVerificationNotification::class,
        ],
    ];

    /**
     * Register any other events for your application.
     *
     * @param  \Illuminate\Contracts\Events\Dispatcher  $events
     * @return void
     */
    public function boot()
    {
        parent::boot();

        Event::listen('u2f.authentication', function ($u2fKey, $user) {
            if (config('google2fa.enabled') && ! empty($user->google2fa_secret)) {
                Validate2faController::loginCallback();
            }
        });
    }
}