curl --request GET \
  --url https://api.monigo.co/v1/usage \
  --header 'Authorization: <api-key>'

{
  "count": 123,
  "rollups": [
    {
      "aggregation": "<string>",
      "created_at": "<string>",
      "customer_id": "<string>",
      "event_count": 123,
      "id": "<string>",
      "is_test": true,
      "last_event_at": "<string>",
      "metric_id": "<string>",
      "org_id": "<string>",
      "period_end": "<string>",
      "period_start": "<string>",
      "updated_at": "<string>",
      "value": 123
    }
  ]
}