Photon - How to name a player?

Apparently PhotonNetwork.playerName is what I need to use. But if i instantiate a player through photon its a game object, I can't then change the player name because its of type PhotonNetwork not gameobject. So how do you assign a player name to a specific player when they join? Heres my code.

 using UnityEngine;
 using System.Collections;
 
 public class MPManager : Photon.MonoBehaviour
 {
 
     public GameObject[] spawnPoints;
 
 
     // Use this for initialization
     void Start()
     {
         spawnPoints = GameObject.FindGameObjectsWithTag("SpawnPoint");
         PhotonNetwork.ConnectUsingSettings("Aftermath Alpha 0.4");
 
         //int spawnRand = Random.Range(0, spawnPoints.Length);
     }
 
     void OnGUI()
     {
         GUILayout.Label(PhotonNetwork.connectionStateDetailed.ToString());
     }
 
     void OnJoinedLobby()
     {
         PhotonNetwork.JoinRandomRoom();
     }
 
     void OnPhotonRandomJoinFailed()
     {
         PhotonNetwork.CreateRoom("Aftermath - AW");
     }
 
     void OnJoinedRoom()
     {
         //555 Stupid inconsistency with random.range, it starts at 1 instead of 0.
         GameObject myPlayer = PhotonNetwork.Instantiate("Player_MP", spawnPoints[Random.Range(1, spawnPoints.Length)].transform.position, spawnPoints[Random.Range(1, spawnPoints.Length)].transform.rotation, 0);
         string playerNumber = Random.Range(1, 1000).ToString();
         myPlayer.GetComponent<PhotonView>().owner.name = playerNumber;
         myPlayer.name = "Player" + playerNumber;
     }
 
     void OnDisconnectedFromPhoton()
     {
         //PhotonNetwork.DestroyPlayerObjects(photonView.ownerId);
         //print(photonView.ownerId + " objects destroyed from server");
     }
 }