How to get the token numbers for different stocks to pass in kiteConnect.getHistoricalData()?

I am getting historical data using the following method. The third parameter is token and I am not sure which stock it is. How do we get these numbers for different stocks?

HistoricalData historicalData = kiteConnect.getHistoricalData(from, to, "2925313", "60minute", false, true);

Thank you.