Great explanation of the differences between username/password and IP authentication. The section about changing IPs while traveling is especially useful, since choosing the right authentication method really depends on how and where the proxy will be used.
For people who are also interested in online platforms and mobile apps, I recently came across this guide about the TR2026 game, which explains the app and its features in more detail: https://apkluckys.com.pk/tr2026-game/