Not the OP, but I'd provide some examples if there were examples to provide. Unfortunately, their documentation is severely lacking in the area I've worked with recently (Apple Sign In on the server end). Basically, it doesn't exist. I can't point to a specific example other than to say it doesn't exist.
And this should be concerning. If Apple wants people to use Apple Sign In, they should do more than mandate its use. They should make it easy to implement, or, at the very least, provide clear documentation.
Instead, I've had to rely on other documentation outside of Apple that all start by sharing their disappointment with Apple's documentation on this subject, and then try to decipher what Apple is doing.
Agreed. Calling something 'garbage' and providing no concrete examples isn't really constructive feedback. It is just name calling.