unity/app/Providers/EventServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Auth\Events\Registered;

use Laravel\Passport\Events\AccessTokenCreated;
use Laravel\Passport\Events\RefreshTokenCreated;

use Illuminate\Auth\Listeners\SendEmailVerificationNotification;
use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Event;

class EventServiceProvider extends ServiceProvider
{
    /**
     * The event listener mappings for the application.
     *
     * @var array
     */
    protected $listen = [
        Registered::class => [
            SendEmailVerificationNotification::class,
        ],

        AccessTokenCreated::class => [
            'App\Listeners\RevokeOldTokens',
        ],

        RefreshTokenCreated::class => [
            'App\Listeners\PruneOldTokens',
        ],
    ];

    /**
     * Register any events for your application.
     *
     * @return void
     */
    public function boot()
    {
        parent::boot();
    }
}