I want to implement Sign in with Apple in my Unity app. The goal is not just to have it running on iOS, but also on Android and in the Unity editor using the REST API. Apple has a very breif article suggesting that is possible on other platforms: https://developer.apple.com/documentation/signinwithapplejs/incorporating_sign_in_with_apple_into_other_platforms . Before I can begin coding that I have to set up the client_id and redirect_uri in the Apple developer console. The article says this can be achieved with WWDR. "client_id
(Required) The developer’s client identifier, as provided by WWDR.". However, every search I have done has only shown guides to implement Sign in with Apple as a web client. This requires creating a Service ID with Sign in with Apple. That requires that I have a web domain that has the file apple-app-site-association in the root of the domain or subdomain. This is the crux of the issue. Because I am not building a web app I do not have a domain where I can host this file. I do have a developer website to host my privacy policy, but it is on the free website builder Wix. Wix does not allow certain file types, it also does not allow you to put files in the root. Other free website builders seem to have the same limitation. This also rules out file hosting sites, like Google drive, because your drives are a page on the domain, not their own domain.
I'm not sure what the solution is here. I'm not sure if I need a Service ID for my use case, but I can't find any references to the alternative. If I do need one, I'm not sure how best to host this file without spending money on something that feels like it should be irrelevant to my use case. I could really use some pointers.
