Whitelist Ultra
Whitelist works with nicknames (without UUID) and is case-sensitive.
Lib-Dependence

OffiCial sources:

• CurseForge
• Hangar
• SpigotMC
• Polymart
• GitHub

Not Official(may not be the latest version, don`t use it!!!):

• KLauncher
• Black-Minecraft
• MetaMods

Minecraft plugin for:

• MC 1.7+(Use 1.13+)
• Bukkit
• Velocity
• Folia
• Paper

If you use Velocity try it

Permissions & Commands:
/wlu add - Add a player to the whitelist
Permission: whitelist-ultra.add

/wlu remove - Remove a player from the whitelist
/wlu del - Remove a player from the whitelist
Permission: whitelist-ultra.remove

/wlu change - Change nick of player in the whitelist
Permission: whitelist-ultra.change

/wlu check - Check if a player is on the whitelist
Permission: whitelist-ultra.check

/wlu list - Display the whitelist
Permission: whitelist-ultra.list

/wlu reload - Reload the plugin
Permission: whitelist-ultra.reload

whitelist-ultra.admin - Full permissions for all actions

Translations
In the file "plugins/whitelist-ultra/config.yml", you can customize your translations.
The plugin supports standard Minecraft color codes such as &a and others, as well as MiniMessage gradients MM Supports only kick messange
Click here for MiniMessage gradient examples.