18k Lol Userpass.txt →

It looks like you’re referring to a (a text file containing leaked usernames and passwords, often used for unauthorized account access) [1].

to see if your email address has been involved in any known data breaches [6].

Please be aware that sharing, distributing, or using such lists to access accounts without permission is and violates the terms of service for most platforms, including League of Legends [2, 3].

via the Riot Games website to add an extra layer of protection [5].

If you are concerned about your own account security, here are the best steps to take: immediately to something unique [4].