src/ShopifyApp/Jobs/AppUninstalledJob.php
protected function cleanShop()
    {
        $this->shop->shopify_token = null;
        $this->shop->plan_id = null;
        $this->shop->save();
    }
protected function cleanShop()
    {
        $this->shop->shopify_token = null;
        $this->shop->plan_id = null;
        $this->shop->save();
    }
Clean the shop data on uninstall.

@return void