Allow async conversion and use a UUID service where possible

src/main/java/com/drtshock/playervaults/commands/DeleteCommand.java

@@ -12,6 +12,11 @@ import org.bukkit.entity.Player;
 public class DeleteCommand implements CommandExecutor {
     @Override
     public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if(VaultOperations.isLocked()){
+            sender.sendMessage(Lang.TITLE+Lang.LOCKED.toString());
+            return true;
+        }
+
         switch (args.length) {
             case 1:
                 if (sender instanceof Player) {