curl --request GET \
  --url https://{subdomain}.nudj.cx/api/v2/analytics/challenges/stats/action-steps \
  --header 'x-api-token: <api-key>'

{
  "steps": [
    {
      "actionId": "<string>",
      "actionTitle": "<string>",
      "stepIndex": 123,
      "completionRate": 123,
      "totalCompletions": 123,
      "dropOffRate": 123,
      "criteriaMetCount": 123,
      "criteriaNotMetCount": 123,
      "totalAttempts": 123,
      "uniqueUsersCount": 123,
      "actionKey": "<string>",
      "category": "<string>"
    }
  ]
}