If you are concerned about your own account security, here are the best steps to take: immediately to something unique [4].
via the Riot Games website to add an extra layer of protection [5]. 18K LOL USERPASS.txt
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]. If you are concerned about your own account
It looks like you’re referring to a (a text file containing leaked usernames and passwords, often used for unauthorized account access) [1]. including League of Legends [2