private function categories()
    {
        $package = Package::where('name', 'Core')->first();
        $core = ConfigCategory::create([
            'key' => 'core',
            'package_id' => $package->id
        ]);
        ConfigCategory::create([
            'key' => 'core_mail',
            'parent_id' => $core->id,
            'package_id' => $core->package_id
        ]);
        ConfigCategory::create([
            'key' => 'core_general',
            'parent_id' => $core->id,
            'package_id' => $core->package_id
        ]);
        $this->general();
        $this->mail();
    }