So it's more or less glorified autofill? It should at most give the site a token. Imagine how signing in with Apple, Facebook, or Google works right now but instead of having your identity with those 3, you have it in that app (or somewhere) and it's all your own. Which means you have to replicate on the user side some of the functionality that they offer and package it in a "fit for a user" format. I mean in the end you're holding on to your whole online identity so extra caution is needed.
So it's more or less glorified autofill? It should at most give the site a token. Imagine how signing in with Apple, Facebook, or Google works right now but instead of having your identity with those 3, you have it in that app (or somewhere) and it's all your own. Which means you have to replicate on the user side some of the functionality that they offer and package it in a "fit for a user" format. I mean in the end you're holding on to your whole online identity so extra caution is needed.