/// <summary>
/// Calls start game method of model and call draw board
/// method of client.
/// </summary>
/// <param name="nameOfGame"> name of game</param>
/// <param name="rows"> number of rows </param>
/// <param name="cols"> number of cols </param>
public void StartGame(string nameOfGame, int rows, int cols)
{
ServerModel model = ServerModel.GetInstance();
// current player
string clientId = Context.ConnectionId;
Maze maze = model.StartGame(nameOfGame, rows, cols, clientId);
//calls draw board function in client
Clients.Client(clientId).drawBoard("myCanvas", maze.ToJSON(),
"playerImg", "exitImg", true);
}