Assets\Scripts\Launcher.cs(66,45): error CS0246: The type or namespace name 'RoomInfo' could not be found (are you missing a using directive or an assembly reference?)

I am making a multiplayer game. My code is not working and it is coming
Assets\Scripts\Launcher.cs(66,45): error CS0246: The type or namespace name ‘RoomInfo’ could not be found (are you missing a using directive or an assembly reference?)
pls help me.
Here’s my code :-

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Photon.Pun;
using TMPro;

public class Launcher : MonoBehaviourPunCallbacks
{
public static Launcher Instance;

[SerializeField] TMP_InputField roomNameInputField;
[SerializeField] TMP_Text errorText;
[SerializeField] TMP_Text roomNameText;
[SerializeField] Transform roomListContent;
[SerializeField] GameObject roomListItemPrefab;

// Start is called before the first frame update
void Start()
{
	Debug.Log("Connecting to Master");
	PhotonNetwork.ConnectUsingSettings();
}

public override void OnConnectedToMaster()
{
	Debug.Log("Connected to Master");
	PhotonNetwork.JoinLobby();
}

public override void OnJoinedLobby()
{
	MenuManager.Instance.OpenMenu("title");
	Debug.Log("Joined Lobby");
}
public void CreateRoom()
{

	if(string.IsNullOrEmpty(roomNameInputField.text))
	{
		return;
	}
	PhotonNetwork.CreateRoom(roomNameInputField.text);
	MenuManager.Instance.OpenMenu("loading");
}
public override void OnJoinedRoom()
{
	MenuManager.Instance.OpenMenu("room");
	RoomText.text = PhotonNetwork.CurrentRoom.Name;
}

public override void OnCreateRoomFailed(short returnCode, string message)
{
	errorText.text = "Room creation Failed:  " + message;
	MenuManager.Instance.OpenMenu("error");
}
public void LeaveRoom()
{
	PhotonNetwork.LeaveRoom();
	MenuManager.Instance.OpenMenu("loading");
}

public override void OnLeftRoom()
{
	MenuManager.Instance.OpenMenu("title");
}
public override void OnRoomListUpdate(List<RoomInfo> roomList)
{
	
}

}

You need to write Using Photon.Realtime; at the top of your script to access the RoomInfo class