Enemy Follow Player

I have made enemies and created script that makes them go to a way point(the Players starting point) but i would like the enemies to follow the Player if someone could help me that'd be great. Below is what i have using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.AI;

public class NPCMove : MonoBehaviour {

 [SerializeField]
 Transform _destination;

 NavMeshAgent _navMeshAgent;



 // Use this for initialization
 void Start()
 {
     _navMeshAgent = this.GetComponent<NavMeshAgent>();

     if (_navMeshAgent == null)
     {
         Debug.LogError("The nav mesh agent component is not attached to " + gameObject.name);
     }
     else
     {
         SetDestination();
     }
 }

 private void SetDestination()
 {
     if(_destination != null)
     {
         Vector3 targetVector = _destination.transform.position;
         _navMeshAgent.SetDestination(targetVector);
     }
 }

}