So my client who already has a shopify website wants to make Android app that does something else than selling products.
But he wants the users to be able to log in to the Android app with the same credentials.
I saw shopify developer provides API endpoints, but didn't have too much time to look through it.
Specifically I want to use Node js as i'm most familiar with it
but I was wondering if i'm on the right track.
Any recommendation/ comments please
Seems you are on right way also you can refer "Shopify POS SDK" its specially design for outside ecommerce solution for shopify.
Yes it possible to you can access store data out site via shopify admin api .... but you can't access DB directly.
You can refer below link: