2d Enemy Flip sprite

Unity Engine
1

I been following brackleys 2d tutorial.
He said there is a way to flip the enemy sprite, but he has not updated it.
Can any one help me. Here is the code to my enemy.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Enemy : MonoBehaviour {

    [System.Serializable]
    public class EnemyStats {
        public int maxHealth = 100;

        private int _curHealth;
        public int curHealth
        {
            get { return _curHealth; }
            set { _curHealth = Mathf.Clamp (value, 0, maxHealth); }
        }

        public int damage = 40;

        public void Init()
        {
            curHealth = maxHealth;
        }
    }

    public EnemyStats stats = new EnemyStats();

    [Header("Optional: ")]
    [SerializeField]
    private StatusIndicator statusIndicator;

    void Start()
    {
        stats.Init ();

        if (statusIndicator != null) {
            statusIndicator.setHealth(stats.curHealth, stats.maxHealth);
        }
   
    }

        public void DamageEnemy (int damage) {
        stats.curHealth -= damage;
        if (stats.curHealth <= 0)
        {
            GameMaster.KillEnemy(this);
        }

        if (statusIndicator != null)
        {
            statusIndicator.setHealth(stats.curHealth, stats.maxHealth);
        }
    }

    void OnCollisionEnter2D(Collision2D _colInfo)
    {
        Player _player = _colInfo.collider.GetComponent<Player>();
        if (_player != null)
        {
            _player.DamagePlayer(stats.damage);
        }
    }
}
2

Get a reference to the sprite renderer and flip the sprite: Unity - Scripting API: SpriteRenderer.flipX