curl --request GET \
  --url https://api.revdesk.com/v1/usage \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "period_start": "<string>",
    "period_end": "<string>",
    "calls_placed": 123,
    "minutes_used": 123,
    "phone_numbers_active": 123,
    "spam_risk_distribution": {
      "low": 123,
      "medium": 123,
      "high": 123,
      "unknown": 123
    }
  }
}