Camera Control/ Rotation C#

Hello, I'm trying to write a script which lets the camera follow the player when he turns. At the moment the camera is following a player which can move forward and backwards but not be able to turn.

I thought about accessing the player's script and the horizontal float value within to tell when it turns but I was unable to.

How can I rotate the player?

My player script is very short so I'll go ahead and drop it in here:

 public class RevisedPlayerScript : MonoBehaviour
 
 
  {
     //Two floats for the two axis.
     public float horizontal = Input.GetAxis("Horizontal");
     public float vertical = Input.GetAxis ("Vertical");
     //Empty Vector3
     private Vector3 moveDirection = Vector3.zero;
 
 
     void FixedUpdate() 
     {
 
         //Two floats continuously change/update with new player inputs. 
         moveDirection = new Vector3(horizontal, 0, vertical); 
 
         //Adding a force. 
         rigidbody.AddForce (moveDirection * ResourceHandler.speed * Time.deltaTime);
 
     
 
     }
         
     
     
     
     
  }

Any help would be greatly appreciated, thanks!