src/Providers/SeedServiceProvider.php
public function register()
    {
        $this->app->singleton(DatabaseSeeder::class);
        $this->app->extend('command.seed', function () {
            return new SeedCommand($this->app['db']);
        });
    }
public function register()
    {
        $this->app->singleton(DatabaseSeeder::class);
        $this->app->extend('command.seed', function () {
            return new SeedCommand($this->app['db']);
        });
    }
Register the seed console command.