fix: register outgoing BungeeCord plugin channel

Author: Grazen0

src/main/java/com/elchologamer/userlogin/UserLogin.java

@@ -46,6 +46,8 @@ public void onEnable() {
 
         reloadPlugin();
 
+        getServer().getMessenger().registerOutgoingPluginChannel(this, "BungeeCord");
+
         // Register FastLogin hook
         if (getServer().getPluginManager().isPluginEnabled("FastLogin")) {
             new FastLoginHook().register();