I am looking at giving possibility for Shopify customers to login in my web app in scope of theme app block extension or theme app embedded block extension. I imagine it will doable using regular credentials (email, password) sign up / sign in as it just involves send http request through app proxy to my back-end however I am not sure if it’s possible to do a redirect to social media identity provider for sign / sign up and and get user back to extension after successful authentication. Can