Error with multiplayer script (not done)

So i get this 3 errors : 1) Assets/Scripts/MenuManager.cs(54,91): error CS0103: The name `maxusers' does not exist in the current context

2) Assets/Scripts/MenuManager.cs(54,53): error CS1502: The best overloaded method match for `MultiplayerManager.StartServer(string, string, int)' has some invalid arguments

3) Assets/Scripts/MenuManager.cs(54,53): error CS1503: Argument `#3' cannot convert `object' expression to type `int'

This is the script : using UnityEngine; using System.Collections;

 public class MenuManager : MonoBehaviour 
 {
     public string CurrentMenu;
     
     public string MatchName = "";
     public string MatchPassword = "";
     public  int MatchMaxPlayers = 32;
     
     
     void Start ()
     {
         CurrentMenu = "Main";
     }
     
     void OnGUI()
     {
         if (CurrentMenu == "Main")
             Menu_Main();
         if (CurrentMenu == "Lobby")
             Menu_Lobby();
         if (CurrentMenu == "Host")
             Menu_HostGame();
     }
 
     public void NavigateTo(string nextmenu)
     {
         CurrentMenu = nextmenu;
     }
     
     private void Menu_Main()
     {
         if (GUI.Button(new Rect(10,10,200,50), "Host Game"))
         {   
             NavigateTo("Host");
         }
         
             GUI.Label (new Rect(220,10,130,30), "Player Name");
         MultiplayerManager.instance.PlayerName = GUI.TextField (new Rect(400,10,200,30),MultiplayerManager.instance.PlayerName);
     }
     
     private void Menu_HostGame()
     {
         //Button Host Game
         if (GUI.Button(new Rect(10,10,200,50), "Back"))
         {   
             NavigateTo("Main");
         }
         
         if (GUI.Button(new Rect(10,60,200,50), "Start Server"))
         {
             MultiplayerManager.instance.StartServer(MatchName, MatchPassword, maxusers);
         }
         
         GUI.Label (new Rect(220,10,130,30), "Match Name");
         MatchName = GUI.TextField (new Rect(400,10,200,30),MatchName);
         
         GUI.Label (new Rect(220,50,130,30), "Match Password");
         MatchPassword = GUI.PasswordField(new Rect(400,50,200,30),MatchPassword, '*');
         
         GUI.Label (new Rect(220,90,130,30), "Match Max Players");
         GUI.Label (new Rect(400,90,200,30), MatchMaxPlayers.ToString());
         MatchMaxPlayers = Mathf.Clamp(MatchMaxPlayers, 8, 32);
         
         if (GUI.Button(new Rect(425,90,25,30), "+"))
             MatchMaxPlayers += 2;
         if (GUI.Button(new Rect(450,90,25,30), "-"))
             MatchMaxPlayers -= 2;
     }
     
     private void Menu_Lobby()
     {
     
     }
 }