The script working-on.coffee was not working. The error was that there was no function defined by the name of findUser. Changed that to robot.userForName and it seems to be working fine.
Changed function name from `findUser` to `robot.userForName`
The findUser function can be found in the availability.coffee script. I copied the function over from that script in my pull request, but your changes seem to work, too.
Oh. I wasn't using availability.coffee. That's why I didn't find the function. My change works fine. No need to add another function for the same job I guess.