How can I make all mobs that are chasing a player, stop chasing that player?

Question

I'm making an Item that when used, it'll make all mobs stop chasing the player that used it. I tried user.endCombat();, but that didn't work.

Here is some of my code:

    @Override
    public TypedActionResult<ItemStack> use(World world, PlayerEntity user, Hand hand) {
        if(!user.getItemCooldownManager().isCoolingDown(this)) {
//          insert code here where mobs chasing player forget about the player/stop chasing the player.
            user.getItemCooldownManager().set(this, 3 * 20);
        }
        return super.use(world, user, hand);
    }

So, how do I make the player stop getting chased by mobs (like zombies) when the player uses the item (right-clicks)?