curl --request GET \
  --url https://{defaultHost}/ad_groups \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "click_through_rate": 123,
      "clicks": 123,
      "cost_per_click": 123,
      "cost_per_lead": 123,
      "cost_per_mille": 123,
      "cost_per_purchase": 123,
      "frequency": 123,
      "impressions": 123,
      "leads": 123,
      "purchase_value": 123,
      "purchases": 123,
      "reach": 123,
      "return_on_ad_spend": 123,
      "spend": 123,
      "spend_currency": "<string>",
      "unique_click_through_rate": 123,
      "unique_clicks": 123,
      "id": "<string>",
      "title": "<string>",
      "status": "active",
      "optimization_goal": "<string>",
      "conversion_location": "website",
      "budget_amount": 123,
      "budget_type": "daily",
      "minimum_daily_spend": 123,
      "bid_type": "minimum_cost",
      "desired_cost_per_result": 123,
      "starts_at": "<string>",
      "ends_at": "<string>",
      "regions": {},
      "audience": {},
      "devices": {},
      "frequency_cap": {},
      "placements": [
        {}
      ],
      "ad_campaign": {},
      "created_at": "<string>",
      "updated_at": "<string>",
      "issues": [
        {
          "id": "<string>",
          "category": "policy_rejection",
          "resource_id": "<string>",
          "resource_type": "ad_campaign"
        }
      ]
    }
  ],
  "page_info": {}
}