Coding with VaultAPI with EssentialsGM?

Hey guys, I need help with a new plugin i'm making. See, I implemented VaultAPI, but I don't know how to get the groups from EssentialsGM. I need it so I can make every group have its own Color in Tab/InGame (Using TagAPI). So, here is my code. Thanks

Code:

public class Main extends JavaPlugin implements Listener{
   
    public void onEnable(){
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
        setupPermissions();
        setupChat();
        setupEconomy();
        getLogger().info("Vault is linked!");
       
    }
   
   
   
    @EventHandler
    public void PlayerName(AsyncPlayerReceiveNameTagEvent e){
        Player p = e.getNamedPlayer();
        e.setTag(ChatColor.DARK_RED + p.getName());
        }
   
   
    @EventHandler
    public void ChatStuff(AsyncPlayerChatEvent event){
        Player p = event.getPlayer();
        String message = event.getMessage();
       
            event.setFormat(ChatColor.WHITE + "<" + ChatColor.DARK_RED + p.getName() + ChatColor.WHITE + "> " + message);
            p.setPlayerListName(ChatColor.DARK_RED + p.getName());
            return;
        }
       
    @EventHandler
    public void RefreshStuff(PlayerJoinEvent e){
        Player p = e.getPlayer();
        p.chat(" ");
    }
    public static Permission permission = null;
    public static Economy economy = null;
    public static Chat chat = null;
 
    private boolean setupPermissions()
    {
        RegisteredServiceProvider<Permission> permissionProvider = getServer().getServicesManager().getRegistration(net.milkbowl.vault.permission.Permission.class);
        if (permissionProvider != null) {
            permission = permissionProvider.getProvider();
        }
        return (permission != null);
    }
 
    private boolean setupChat()
    {
        RegisteredServiceProvider<Chat> chatProvider = getServer().getServicesManager().getRegistration(net.milkbowl.vault.chat.Chat.class);
        if (chatProvider != null) {
            chat = chatProvider.getProvider();
        }
 
        return (chat != null);
    }
 
    private boolean setupEconomy()
    {
        RegisteredServiceProvider<Economy> economyProvider = getServer().getServicesManager().getRegistration(net.milkbowl.vault.economy.Economy.class);
        if (economyProvider != null) {
            economy = economyProvider.getProvider();
        }
 
        return (economy != null);
    }
   
    }

bummp

EDIT by Moderator: merged posts, please use the edit button instead of double posting.