Slightly related, I was able to take over an account with functionality similar to this in one of the apps from a big tech company recently. I reported it but n

Slightly related, I was able to take over an account with functionality similar to this in one of the apps from a big tech company recently. I reported it but no response so far. Are there companies using unique fingerprinting methods to map users for faster logins? I didn't test it further. It happened accidentally.