The resource has been removed from spigot this is the latest version works on 1.19.4 enjoy
The previous resource realized on this site:
https://www.blackspigot.com/downloads/bungee-1-7-x-1-13-premium-authenticator-login-only-for-non-premium.10287/
tterrorpl submitted a new resource:
✓ Bungee 1.7.x - 1.13 | Premium Authenticator | Login only for non-premium BPA v5.2.5 - https://www.spigotmc.org/resources/bungee-1-7-x-1-16-premium-authenticator-login-only-for-non-premiu
Read more about this resource...