next-auth custom oauth provider with Shopify Customer Account API

Demo of creating a next-auth oath provider with Shopify Customer Account API

Shopify Setup

1. Install headless app on Shopify
2. Choose "Confidential" client type
3. Configure callback URL, use http://localhost:3000/api/auth/callback/shopify for local testing
4. Copy Client ID, Client secret and shop ID (from Application endpoints) to your .env file