How do i connect to a host that is registered on the MasterServer?

I'm making a matchmaking system for my game but i realized that i don't know how to retrieve connection info from a host within the MasterServer so i'm stuck .

         private string charactersToRandom = "0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM";
         private string generatedServerName = "";
         private int randomInteger;
     
     
 
     void Start () {
         MasterServer.RequestHostList ("ThisIsMyGame");
         Invoke("Connector", 3);
     }
 
 
     void Connector () {
         if(MasterServer.PollHostList ().Length == 0){
             StartupHost ();
             Debug.Log ("Sessions available : " + MasterServer.PollHostList ().Length);
         }
         else {
             Debug.Log ("Sessions available : " + MasterServer.PollHostList ().Length);
             HostData[] hostData = MasterServer.PollHostList ();
             JoinGame (hostData [0].gameName);
             int i = 0;
             while (i < hostData.Length) {
                 Debug.Log ("Game name: " + hostData [i].gameName);
                 i++;
             }
         }
     }
 
     public void StartupHost () {
         GenerateServerName ();
         bool useNat = !Network.HavePublicAddress ();
         Network.InitializeServer (4, 3781, useNat);
         MasterServer.RegisterHost ("ThisIsMyGame", generatedServerName);
         NetworkManager.singleton.StartHost ();
         Debug.Log ("Host");
     }
 
     public void JoinGame (string ipToConnect) {
         Network.Connect (ipToConnect, 3781); 
         NetworkManager.singleton.StartClient ();
         Debug.Log ("Client");
     }
 
 
 
     //SERVER NAME GENERATOR
     void GenerateServerName () {
         for (int i = 0; i < 25; i++) {
             randomInteger = Random.Range (0, charactersToRandom.Length);
             generatedServerName = generatedServerName + charactersToRandom [randomInteger];
         }
     }
         
 }