I'm thinking about how to setup associated domains for universal links and password autofill for our users. We currently have users on our own managed domains: {username}.x.storage, but they can also use their own custom domains such as x.nl.
I know that I could wildcard our own managed domain, but in Xcode, I need to fill in associated domains as well. So if a user has x.nl for domain, I don't want to list all custom domains in Xcode, that would be a huge hassle. What is the recommended approach?