It might be possible with this miniOrange Single Sign On‑SSO - One-click Single Sign-On login with any IDP for B2C/B2B stores | Shopify App Store but I think you might need to have an external source that both discourse and shopify use.
It might be possible with this miniOrange Single Sign On‑SSO - One-click Single Sign-On login with any IDP for B2C/B2B stores | Shopify App Store but I think you might need to have an external source that both discourse and shopify use.