Hi, I am developing a private app for my client and now working on checkout feature.
I read this document and it says completing checkout via Storefront API is only allowed for sales channel.
https://shopify.dev/custom-storefronts/checkout#complete-the-checkout
But, No errors returned when I called `checkoutCompleteWithTokenizedPaymentV3` from Shopify GraphiQL App.
Does it mean this mutation can be used from private app ?
Or webUrl is the only option ?
