NetworkManager.cs

using System.Collections;
using UnityEngine;

public class NetworkManager : MonoBehaviour
{

    [SerializeField] PhotonLogLevel logLevel = PhotonLogLevel.Informational;
    [SerializeField] string gameVersion = "0.0.0";
    [SerializeField] Camera sceneCamera;
    [SerializeField] GameObject playerPrefab;
    [SerializeField] GameObject cameraPrefab;
    GUIStyle boxStyle = null;

    void Start()
    {
        Connect();
    }

    void Connect()
    {
        PhotonNetwork.ConnectUsingSettings(gameVersion);
        PhotonNetwork.logLevel = logLevel;
    }

    void OnGUI()
    {
        var list = PhotonNetwork.GetRoomList();
        if (!PhotonNetwork.inRoom &&  PhotonNetwork.connected)
        {
            GUI.BeginGroup(new Rect(Screen.width / 2 - 200, Screen.height / 2 - 50, 400, 100));
            if (list.Length > 0)
            {
                    PhotonNetwork.JoinRoom("TestRoom");
            }
            else
            {
                if (GUI.Button(new Rect(0, 0, 400, 100), "Create Room"))
                {
                    PhotonNetwork.CreateRoom("TestRoom");
                }
            }
            GUI.EndGroup();

        }

        if (PhotonNetwork.connected)
            return;

        boxStyle = new GUIStyle(GUI.skin.box) { alignment = TextAnchor.MiddleCenter };
        string connectionState = PhotonNetwork.connectionStateDetailed.ToString();
        GUI.BeginGroup(new Rect(Screen.width / 2 - 200, Screen.height / 2 - 50, 400, 100));
        GUI.Box(new Rect(0, 0, 400, 100), connectionState, boxStyle);
        GUI.EndGroup();
    }

    void OnJoinedLobby()
    {
    // UI ?
    }

    void OnPhotonRandomJoinFailed()
    {
        PhotonNetwork.CreateRoom(null);
    }

    void OnJoinedRoom()
    {
        CreatePlayer();
    }

    void CreatePlayer()
    {

        float rnd = Random.Range(-5, 5);
        GameObject player_gbj = PhotonNetwork.Instantiate(playerPrefab.name, new Vector3(rnd, .25f, rnd), Quaternion.identity, 0);
        GameObject camera_gbj = Instantiate(cameraPrefab, new Vector3(0, 0, 0), Quaternion.identity);
        SetUpComponents(player_gbj, camera_gbj);

    }

    void SetUpComponents(GameObject player_gbj, GameObject camera_gbj)
    {
        var gunBehaviour = player_gbj.GetComponent<GunBehaviour>();
        gunBehaviour.MainCamera = camera_gbj.GetComponentInChildren<Camera>();

        var zoom = camera_gbj.GetComponent<CameraZoom>();
        gunBehaviour.Zoom = zoom;

        var animation = player_gbj.GetComponentInChildren<CharacterAnimator>();
        animation.Zoom = zoom;

        var camMovement = camera_gbj.GetComponent<BasicCameraBehaviour>();
        camMovement.Target = player_gbj.transform;

        camera_gbj.SetActive(true);
        sceneCamera.gameObject.SetActive(false);
    }
    private void OnConnectedToMaster()
    {
        PhotonNetwork.JoinLobby();
    }
}