Please post your server log and describe your setup. You mean https://github.com/games647/FastLogin/commit/5676e99decd3a7dfcd455618829f9bf430c91217 . It's already in-progress. The issue is that both Spigot and BungeeCord has no really good way to handle Sessions (except play sesssions - after login process is completed). So it's necessary to handle this completely on our own.