This is just an initial check.
1) Did you enter the your Bolt Cloud Api key in line number 3?
2) Did you enter the sandbox url in line number 4?
3) Did you enter your email address in line number 5?
The above is to check what is not very commonly missed.
The following however gets missed very freqyently.
4) Did you enter the bolt id in line number 21?
Do reply back if you face any issues.