NexAuth: https://www.spigotmc.org/resources/nexauth-simple-auth-system-for-offline-mode-1-16-1-18.88015/
Provides a simple auth system for your players to protect their accounts in offline mode servers.
Version hosted in TeTeOS.Net: [You can download with wget]
Links: (You need to install both for it to work.)
https://www.teteos.net/files/minecraft/plugins/NexEngine-2.2.8.jar
https://www.teteos.net/files/minecraft/plugins/NexAuth-1.3.8.jar
Plugin version: 1.3.8
Tested MC versions: 1.17 - 1.19
⚠️ Crashing in 1.14.5 version detected. If not working in your server, please try alternate plugin:
LoginSecurity : https://www.teteos.net/d/296-minecraft-plugin-loginsecurity-java