Telegram code error: request was unsuccessful

am unable to find error in telegram code its showing request was unsuccessful
something went wrong while returning the sensor value

where did I went wrong ?
what is the telegram chat id?

Check if you have given the right API and device ID in the configuration file. Check hardware connections.

Ensure that you have already messaged and set up with the BotFather

For getting your Telegram Chat ID:
Open your Telegram app, open the channel, click on the name of the channel,
you will see a heading named “Info” and Invite Link, it looks something like
so, this will be your chat ID @temp_alert_system