message: Added comment explaining the otplib window size
diff: @@ -4,6 +4,8 @@ const otplib = require('otplib')
  const utils = require('../lib/utils')
  otplib.authenticator.options = {
  + // Accepts tokens as valid even when they are 30sec to old or to new
  + // This is a standard as the clocks of the authenticator and server might not align perfectly.
  window: 1
  }
  