Force authentication from trusted source

Hi guys,

I am trying to connect my app with Shopify, however I cannot use built-in Shopify as auth provider because it is tied with single eshop.

Flow (very simplified): User hit “Open app” button in Shopify, which is basically a redirect to my app, with authentication round-trip, that, after successful validation, ends in I get here a authenticated Shopify user email, which I may trust.

Flow should continue to my Angular SPA where the Shopify user should already be authenticated. Assume that Shopify user is already registered user in Auth0 with same email. Is this doable?

Thanks a lot!