Can anyone help me with my network script?

So i am trying to learn how to make a networking game, i can start a server and connect to it but im having problems disconnecting, or so i think. Im not sure which functions to use and i was hoping for some help. The script that i made up is:

 using UnityEngine;
 using System.Collections;
 
 public class NetworkMenu : MonoBehaviour 
 {
     public string connectionIP = "127.0.0.1";
     public int connectionPort = 25001;
     
     public GameObject player;
     
     
     
     void OnDisconnectedFromServer(NetworkDisconnection info)
     {
         if (Network.isServer) 
         {
             // If you are the server
             Destroy(GameObject.FindWithTag("Player"));
             MasterServer.UnregisterHost();
         }
         else{
             if (info == NetworkDisconnection.LostConnection)
             {
                 // If you lose connection to the server
                 Destroy(GameObject.FindWithTag("Player"));
             }else{
                 // If you are client and you press disconnect
                 Destroy(GameObject.FindWithTag("Player"));
             }
         }
     }
     
     void SpawnPlayer ()
     {
         Instantiate(player, transform.position, Quaternion.identity);
     }
     
     void OnServerInitialized ()
     {
         SpawnPlayer ();
     }
     
     void OnConnectedToServer ()
     {
         SpawnPlayer ();
     }
     
     void OnGUI()
     {
         if (Network.peerType == NetworkPeerType.Disconnected)
         {
             GUI.Label(new Rect(10, 10, 300, 20), "Status: Disconnected");
             if (GUI.Button(new Rect(10, 30, 120, 20), "Client Connect"))
             {
                 Network.Connect(connectionIP, connectionPort);
             }
             if (GUI.Button(new Rect(10, 50, 120, 20), "Initialize Server"))
             {
                 Network.InitializeServer(32, connectionPort, false);
             }
         }
         else if (Network.peerType == NetworkPeerType.Client)
         {
             GUI.Label(new Rect(10, 10, 300, 20), "Status: Connected as Client");
             if (GUI.Button(new Rect(10, 30, 120, 20), "Disconnect"))
             {
                 Network.Disconnect(200);
             }
         }
         else if (Network.peerType == NetworkPeerType.Server)
         {
             GUI.Label(new Rect(10, 10, 300, 20), "Status: Connected as Server");
             if (GUI.Button(new Rect(10, 30, 120, 20), "Disconnect"))
             {
                 Network.Disconnect(200);
             }
         }
     }
 }

Also for some reason the OnConnectedToServer function isnt being called. What else should i add to this Script? Thanks for any help.