curl --request GET \
  --url https://{subdomain}.nudj.cx/api/v2/analytics/community/content/overview

{
  "challenges": {
    "totalParticipants": 123,
    "totalCompletions": 123,
    "completionRate": 123,
    "averageTimeToComplete": 123,
    "startedNotCompleted": 123
  },
  "achievements": {
    "totalAchievementsEarned": 123,
    "achievementsCompleted": 123,
    "achievementsInProgress": 123,
    "totalRewardsFromAchievements": 123
  }
}