curl --request GET \
  --url https://ella.navgurukul.org/api/admin/stats

{
  "total_users": 123,
  "total_sessions": 123,
  "completed_sessions": 123,
  "total_speaking_minutes": 123,
  "level_distribution": {},
  "users": [
    {
      "id": "<string>",
      "name": "<string>",
      "age": "<string>",
      "location": "<string>",
      "level": "<string>",
      "level_label": "<string>",
      "total_sessions": 123,
      "completed_sessions": 123,
      "total_speaking_seconds": 123,
      "created_at": "2023-11-07T05:31:56Z"
    }
  ],
  "recent_conversations": [
    {
      "id": "<string>",
      "user_name": "<string>",
      "user_level": "<string>",
      "topic": "<string>",
      "header_title": "<string>",
      "duration_seconds": 123,
      "completed": true,
      "message_count": 123,
      "created_at": "2023-11-07T05:31:56Z"
    }
  ]
}