How do I make an entity fly towards the player when right-clicking in that general direction?

Is the Vacpack an item or armor. If armor put the following snippet in onAmorTick(), 

Keep in mind the following snippet is only for items but you can do similar with entities. 

public ActionResult<ItemStack> onItemRightClick(World worldIn, PlayerEntity playerIn, Hand handIn)
    {
        ItemStack itemstack = playerIn.getHeldItem(handIn);
        if (itemstack.hasTag() && itemstack.getTag().getBoolean("magnetized") == true) {
            List<ItemEntity> itemEntities = playerIn.world.getEntitiesWithinAABB(ItemEntity.class, playerIn.getBoundingBox().grow(10));
            Iterator iterator = itemEntities.iterator();
            while (iterator.hasNext()) {
                ItemEntity item = (ItemEntity) iterator.next();
                double distX = playerIn.getPosX() - item.getPosX();
                double distZ = playerIn.getPosZ() - item.getPosZ();
                double distY = item.getPosY() + 1.5D - item.getPosY();
                double dir = Math.atan2(distZ, distX);
                double speed = 1F / item.getDistance(playerIn) * 0.5;
                if (distY < 0) {
                    item.setMotion(item.getMotion().x, item.getMotion().y + speed, item.getMotion().z);
                }
                item.setMotion(Math.cos(dir) * speed, item.getMotion().y, item.getMotion().z);
                item.setMotion(item.getMotion().x, item.getMotion().y, Math.sin(dir) * speed);
            }
        }
        return ActionResult.resultSuccess(itemstack);
    }