Third Party Need help about how to integration this script with photon unity network.

I'm try to make a play can carrying object in multiplayergmae using unity photon networking
please help.

here is my code.

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class PickupObject : MonoBehaviour {
6.     GameObject mainCamera;
7.     bool carrying;
8.     GameObject carriedObject;
9.     public float distance;
10.     public float smooth;
11.     // Use this for initialization
12.     void Start () {
13.         mainCamera = GameObject.FindWithTag("MainCamera");
14.     }
15.    
16.     // Update is called once per frame
17.     void Update () {
18.         if(carrying) {
19.             carry(carriedObject);
20.             checkDrop();
21.             //rotateObject();
22.         } else {
23.             pickup();
24.         }
25.     }
26.  
27.     void rotateObject() {
28.         carriedObject.transform.Rotate(5,10,15);
29.     }
30.  
31.     void carry(GameObject o) {
32.         o.transform.position = Vector3.Lerp (o.transform.position, mainCamera.transform.position + mainCamera.transform.forward * distance, Time.deltaTime * smooth);
33.         o.transform.rotation = Quaternion.identity;
34.     }
35.  
36.     void pickup() {
37.         if(Input.GetKeyDown (KeyCode.E)) {
38.             int x = Screen.width / 2;
39.             int y = Screen.height / 2;
40.  
41.             Ray ray = mainCamera.GetComponent<Camera>().ScreenPointToRay(new Vector3(x,y));
42.             RaycastHit hit;
43.             if(Physics.Raycast(ray, out hit)) {
44.                 Pickupable p = hit.collider.GetComponent<Pickupable>();
45.                 if(p != null) {
46.                     carrying = true;
47.                     carriedObject = p.gameObject;
48.                     //p.gameObject.rigidbody.isKinematic = true;
49.                     p.gameObject.GetComponent<Rigidbody>().useGravity = false;
50.                 }
51.             }
52.         }
53.     }
54.  
55.     void checkDrop() {
56.         if(Input.GetKeyDown (KeyCode.E)) {
57.             dropObject();
58.         }
59.     }
60.  
61.     void dropObject() {
62.         carrying = false;
63.         //carriedObject.gameObject.rigidbody.isKinematic = false;
64.         carriedObject.gameObject.GetComponent<Rigidbody>().useGravity = true;
65.         carriedObject = null;
66.     }
67. }
68.  

 

https://docs.unity3d.com/Manual/UNetSetup.html