message: Returning the challenge id for every solved challenge
  This is required to map between challenge and country in the frontend
diff: @@ -104,6 +104,7 @@ exports.sendNotification = function (challenge, isRestore) {
  if (!this.notSolved(challenge)) {
  const flag = this.ctfFlag(challenge.name)
  const notification = {
  + id: challenge.id,
  name: challenge.name,
  challenge: challenge.name + ' (' + challenge.description + ')',
  flag: flag,
  