AppServiceProvider.php for https://medium.com/p/576c8fa5f498

AppServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Notifications\Channels\DatabaseChannel as IlluminateDatabaseChannel;
use Illuminate\Notifications\DatabaseNotification as BaseNotification;
use App\Channels\DatabaseChannel;
use App\DatabaseNotification;

class AppServiceProvider extends ServiceProvider
{
    public function boot()
    {
        $this->app->instance(IlluminateDatabaseChannel::class, new DatabaseChannel());
        $this->app->instance(BaseNotification::class, new DatabaseNotification());
    }
}