Displaying number of people in matchmake using Unity UI

Hello all. I've just started learning about using multiplayer in unity, I thought PUN is a great place to start. So far I can connect, disconnect, create a room, instantiating players and when the matchmaking is full, then the game starts.
I've got this for my manager so far
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Photon.Pun;
using Photon.Realtime;
using UnityEngine.UI;

public class MenuManager : MonoBehaviourPunCallbacks
{
    bool isConnecting;
    [SerializeField]
    public Button PlayButton_;

    [Header("Panel's...")]
    public GameObject LobbyPanel;
    public GameObject MatchmakePanel;

    [Header("Text...")]
    public Text PlayerAmount;

    private void Awake()
    {
        PhotonNetwork.AutomaticallySyncScene = true;
    }
    public void PlayButton()
    {
        isConnecting = true;

        PlayButton_.interactable = false;
        LobbyPanel.SetActive(false);
        MatchmakePanel.SetActive(true);

        if (PhotonNetwork.IsConnected)
        {
            PhotonNetwork.JoinRandomRoom();
        }
        else
        {
            PhotonNetwork.GameVersion = "1";
            PhotonNetwork.ConnectUsingSettings();
        }
    }
    public override void OnConnectedToMaster()
    {
        base.OnConnectedToMaster();

        if (isConnecting)
        {
            PhotonNetwork.JoinRandomRoom();
        }
    }
    public override void OnJoinRandomFailed(short returnCode, string message)
    {
        base.OnJoinRandomFailed(returnCode, message);

        PhotonNetwork.CreateRoom(null, new RoomOptions { MaxPlayers = 2 });
    }
    public override void OnDisconnected(DisconnectCause cause)
    {
        base.OnDisconnected(cause);

        isConnecting = false;
        PlayButton_.interactable = true;
    }
    public override void OnJoinedRoom()
    {
        base.OnJoinedRoom();
    }

    public override void OnPlayerEnteredRoom(Photon.Realtime.Player newPlayer)
    {
        base.OnPlayerEnteredRoom(newPlayer);

        if(PhotonNetwork.PlayerList.Length == 2)
        {
            PhotonNetwork.LoadLevel(1);
        }
    }

    public override void OnPlayerLeftRoom(Photon.Realtime.Player otherPlayer)
    {
        base.OnPlayerLeftRoom(otherPlayer);
    }
}

What I want is in the matchmaking panel. It displays the amount of people in the room? How could I do this. I already made the variable for the text!! Thanks in advance