Added new commands:
/reallogin deletepin <name>
/reallogin setpin <name> <pin>

+ Added /reallogin setpin check if PIN is null
+ Added Kick-Message translatable string in config.yml
+ Fixed PIN ItemStack numbers not showing.
+ Max-Pin-Length & Hide-Inventories added to config.yml
+ Fixed register with empty PINs
+ Fixed Paper specific Bug with Commands
+ Code cleanup.

I wanna thank NOXX_Supra for the donations and help in testing the plugin. Thank you!