2. Shopify Integration
  3. Getting Started- Creating Custom App

I need to enable permissions when setting up the integration

Please ensure that you've given Shopify permission to allow merchant approval for read_products scope and read and write on the inventory scope to set up. Ensure that you have allowed our private app the ability to access your storefront data. To check if this is on, go to Apps from your Shopify admin. Click Manage private apps. Click the name of the app whose permissions you want to change. In the Storefront API section, under Storefront API permissions, select which store data you want the app to access. Please see this article for more details.