Retrieving all user games, including purchases listed on Account Library

Housekeeping job for pending requests.
Requested by [eljenso](https://github.com/eljenso) on Feb 15, 2023, [here](https://github.com/achievements-app/psn-api/issues/34#issuecomment-1431721149).

Reference: none.

Question: Is this even possible? If possible, does Sony give this information only to the logged user or for any user? I wonder because of privacy reasons.
If they provide this information for external users, then it would be possible to cross reference purchase times with price tags on a website like [PSPrices](https://psprices.com/region-us/index?platform=PS4) and while that could be a really cool project to make, it would also be very dangerous data to have public.