Niko Home Control API - What is the solution to the puzzle in the JSON code when activating the access to the Hobby API?

The solution to this puzzle is a number that you can find on the Internet in “The Hitchhiker’s Guide to the Galaxy, Douglas Adams, 1979”. Enter the solution and correct the syntax error. Next, click on the Parse button to check whether your solution is correct.

Please note: You can only continue to the next step once the JSON code contains your solution and once the syntax error in the code has been corrected.