AuthServiceProvider.php

<?php
public function boot()
{
    $this->registerPolicies();

    Passport::routes();
    Passport::tokensCan([
        'staff' => 'Access Admin Backend',
        'customer' => 'Access Customer App',
        'role' => 'Description for role',
    ]);

    Passport::setDefaultScope([
        'customer',
    ]);


}