Hi! Since the regular plan of Shopify still cannot transfer account details from the custom storefront to the checkout, we need to find a solution for making it people as easy as possible. Right now they need to login again, to get their address filled, and this is not what I want. Would it be possible, and how, to get the address data transfered when the user clicks on the checkout button? I did read something about it here (https://github.com/Shopify/storefront-api-examples/issues/80) but I am not sure if this is really possible.