unity/app/Providers/AuthServiceProvider.php

<?php

namespace App\Providers;

use Laravel\Passport\Passport;
use Illuminate\Foundation\Support\Providers\AuthServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Gate;

class AuthServiceProvider extends ServiceProvider
{
    /**
     * The policy mappings for the application.
     *
     * @var array
     */
    protected $policies = [
        // 'App\Models\Model' => 'App\Policies\ModelPolicy',
    ];

    /**
     * Register any authentication / authorization services.
     *
     * @return void
     */
    public function boot()
    {
        $this->registerPolicies();
        Passport::routes();

        Passport::tokensCan([
            'only-user' => 'only user',
            'only-admin' => 'only admin',
            'only-contributor' => 'only contributor',
            'only-reviewer' => 'only reviewer',
        ]);

        // Passport::$revokeOtherTokens;
        // Passport::$pruneRevokedTokens;
    }
}