access object from another

hello all ! I'm a begginer and I learn Unity with a book that gave us that code :

 using UnityEngine;
 using System.Collections;
 
 public class PlayerStats : MonoBehaviour {
 
     public int health = 6;
     public int coinsCollected = 0;
 
     public void CollectedCoin(int coinValue){
         this.coinsCollected = this.coinsCollected += coinValue;
 
     }
 }

and in the coin script :

 using UnityEngine;
 using System.Collections;
 
 public class CoinPickUp : MonoBehaviour {
 
     public int coinValue = 1;
 
 
     void OnTriggerEnter2D(Collider2D collider)
     {
         if (collider.tag == "Player"){
 
 
             PlayerStats stats = collider.gameObject.GetComponents<PlayerStats>();
             stats.CollectedCoin(this.coinValue);
             Destroy(this.gameObject);
 
         }
     }
 }

and here's the log error :

 Assets/_scripts/CoinPickUp.cs(14,37): error CS0029: Cannot implicitly convert type `PlayerStats[]' to `PlayerStats'

Please someone know how to resolve this ?

Thank you very much !