Photon Join room (Not Random Room)

hey gang just wondering how you join a room in photon (not joinrandomroom) but joint room with a name? Owner of the quest starts the room, other players joining the quest join his room :)

     public string QuestName;
     public string Username;
     public bool IamTheOwner;
 
 
 
     
     // Update is called once per frame
     public void LeveOnMission () {
         PhotonNetwork.Disconnect ();
     }
 
 
     void OnDisconnectedFromPhoton(){
         LoadQuest ();
     }
 
 
 
 
     void LoadQuest(){
         PhotonNetwork.autoJoinLobby = true;    // we join randomly. always. no need to join a lobby to get the list of rooms.
         PhotonNetwork.ConnectUsingSettings("EAO 0.1");
     }
 
 
 
     public  void OnConnectedToMaster()
     {
 
         string    RoomName = Username;
 
         if (IamTheOwner == false) {
             RoomOptions roomOptions = new RoomOptions () { isVisible = true, maxPlayers = 4};
             Debug.Log ("OnPhotonRandomJoinFailed() was called by PUN. No random room available, so we create one. Calling: PhotonNetwork.CreateRoom(null, new RoomOptions() {maxPlayers = 4}, null);");
             PhotonNetwork.JoinRoom(roomOptions);    
         }
 
         if (IamTheOwner == true) {
             RoomOptions roomOptions = new RoomOptions () { isVisible = true, maxPlayers = 4 };
             Debug.Log ("OnPhotonRandomJoinFailed() was called by PUN. No random room available, so we create one. Calling: PhotonNetwork.CreateRoom(null, new RoomOptions() {maxPlayers = 4}, null);");
             PhotonNetwork.CreateRoom (RoomName, roomOptions, TypedLobby.Default);
         }
     }