Plugin Help How to retrieve groupmanager displaynames?

Code:

Code:

            if(cmd.getName().equalsIgnoreCase("ccp")){
                if (sender.hasPermission("ChatManager.CCP")) {
                    if (args.length == 0) {
                        sender.sendMessage(ChatColor.GRAY + "[ChatManager]" + ChatColor.RED + " Please State A Player!");
                        return true;
                    }
                    @SuppressWarnings("deprecation")
                    Player target = Bukkit.getServer().getPlayer(args[0]);
                    if (target == null) {
                        sender.sendMessage(ChatColor.GRAY + "[ChatManager]" + ChatColor.RED + " That Is A Invalid Username!");
                        return true;
                    }
                    for(int i = 0; i < 150; i++){
                    target.sendMessage("");
                }
                    target.sendMessage( ChatColor.GRAY + "[ChatManager] " + ChatColor.RED + sender.getName() + ChatColor.GRAY + " Has Cleared Your  Chat!");
                    sender.sendMessage(ChatColor.GRAY + "[ChatManager] " + ChatColor.RED + target.getName() + ChatColor.GRAY + "'s Chat Has Been Cleared!");

            return true;
           
                }
                if(!sender.hasPermission("ChatManager.CCP")){
                    sender.sendMessage(ChatColor.GREEN + "[ChatManager]" + ChatColor.YELLOW + " You Have Been Denied Access To This Command! " + ChatColor.BLUE + " Plugin By SergeantBud!" );
                   }
                    }

How would I make it so I could replace target.getName() or sender.getName() with their groupmanager prefix? E.g, instead of "Notch", "[PREFIX] Notch [SUFFIX]"
Ty for help ^-^