Applying a potion effect via arrow

Hi! I am trying to figure out how to apply the weakness potion effect to the player the arrow of the kit atlatl had hit. In other words, I want the player who threw the arrow (The atlatl kit) to hit a player with that arrow and when they do, it adds the potion effect of weakness for 20 seconds to the player it hit. Can anyone help? I have 2 seperate listeners for the kit atlatl which are shown here:

Code:

@EventHandler
    public void onAtlatlThrow(PlayerInteractEvent e){
        final Player player = e.getPlayer();
        if (e.getAction() == Action.RIGHT_CLICK_AIR && player.getItemInHand().getType() == Material.ARROW){
            Arrow arrow = player.launchProjectile(Arrow.class);
        //    arrow.setMetadata(null, null , );
            if (player.getGameMode() != GameMode.CREATIVE){
                if (player.getItemInHand().getAmount() > 1){
                    player.getItemInHand().setAmount(player.getItemInHand().getAmount() - 1);
                    arrow.setVelocity(player.getLocation().getDirection().multiply(2));
                   
                }else{
                    arrow.setVelocity(player.getLocation().getDirection().multiply(2));
                    player.setItemInHand(new ItemStack(Material.AIR));    }
            }
           
        }
    }

Code:java

@EventHandler
    public void OnAtlatlArrowHit(EntityDamageByEntityEvent e){
        Arrow arrow = (Arrow) e.getDamager();
        Player hit = (Player) e.getEntity();
        Player shooter = (Player)((Arrow) e.getEntity()).getShooter();
        if (plugin.Atlatl.contains(shooter.getName())){
            if (e.getCause().equals(DamageCause.PROJECTILE)){
                hit.addPotionEffect(new PotionEffect(PotionEffectType.WEAKNESS, 20*20, 1));
            }
        }
    }
}

I create the second listener to try to apply that potion effect to the player it hit but it will not work. Can anyone help me?

 

Check projectile hit event and get if entity is arrow, it it is make a arrow instance and then get nearby entities and apply the potion while looping ANC checking for the closest one, or if there is a way to get entity hit by arrow, idk