Multiplayer Help?

Hi, I followed a tutorial video on how to connect a Client to a Server it worked, but I have no clue how to actually log into the world with a character, can someone help by adding something to code or changing something..Thanks Dis`using UnityEngine; using System.Collections;

public class Menu : MonoBehaviour {

 public string IP = "127.0.0.1";
 public int Port = 25001;
 
 public GameObject target;
 
 public string username = "";
 bool RegisterUI = false;
 bool LoginUI = false;
 
 void OnGUI()
 {
     if(Network.peerType == NetworkPeerType.Disconnected)
     {
         if(GUI.Button(new Rect(100,100,100,25),"Start Client"))
         {
             Network.Connect(IP,Port);
         }
         if(GUI.Button(new Rect(100,125,100,25),"Start Server"))
         {
             Network.InitializeServer(10,Port);
         }
     }
     else {
         if(Network.peerType == NetworkPeerType.Client)
         {
             if(RegisterUI == true && LoginUI == false)
             {
                 username = GUI.TextArea(new Rect(100,125,110,25),username);
                 
                 if(GUI.Button(new Rect(100,150,110,25),"Register"))
                 {
                     networkView.RPC("Register",RPCMode.Server,username);
                     RegisterUI = false;
                 }
             }
             else if(LoginUI == true && RegisterUI == false)
             {
                 username = GUI.TextArea(new Rect(100,125,110,25),username);
                 
                 if(GUI.Button(new Rect(100,150,110,25),"Login"))
                 {
                     networkView.RPC("Login",RPCMode.Server,username);
                 }
             }
             else {
             
                 GUI.Label(new Rect(100,100,100,25),"Client");
                 
                 if(GUI.Button(new Rect(100,125,110,25),"Login"))
                 {
                     LoginUI = true;
                 }
                 
                 if(GUI.Button(new Rect(100,150,110,25),"Register"))
                 {
                     RegisterUI = true;
                 }
                 
                 
                 if(GUI.Button(new Rect(100,175,110,25),"Logout"))
                 {
                     Network.Disconnect(250);    
                 }
             }
             
         }
         if(Network.peerType == NetworkPeerType.Server)
         {
             GUI.Label(new Rect(100,100,100,25),"Server");
             GUI.Label(new Rect(100,125,100,25),"Connections: " + Network.connections.Length);
             
             if(GUI.Button(new Rect(100,150,100,25),"Logout"))
             {
                 Network.Disconnect(250);    
             }
         }
     }
 }
 
 [RPC]
 void Login(string Username)
 {
     if(Network.isServer)
     {
         bool checkUsername = PlayerPrefs.HasKey(Username);
         
         if(checkUsername == true)
         {
             networkView.RPC("LoadLevel",RPCMode.Others);
         }    
     }
 }
 
 [RPC]
 void LoadLevel()
 {
     if(Network.isClient)
     {
         if(Application.loadedLevel == 0)
         {
             Application.LoadLevel("Level1");
         }
     }
 }
 
 [RPC]
 void Register(string Username)
 {
     if(Network.isServer)
     {
         PlayerPrefs.SetString(Username,Username);
     }
 }
 

} `