in my case i need to identify my app's user by their unique device id. i have came across a solution by getting id using SystemIdentification.GetSystemIdForPublisher(). But i also came across a stackoverflow question where the id is getting duplicate across other systems.
https://stackoverflow.com/questions/61352554/getsystemidforpublisher-doesnt-return-unique-id
Kindly help me with the right fuctionality to achieve my case.