curl --request GET \
  --url https://api.human.prod.artistree.io/v1/organizations/{organization_id}/billing \
  --header 'Authorization: Bearer <token>'

{
  "plan": "<string>",
  "billing_type": "<string>",
  "total_count": 123,
  "total_asset_based_usage": 123,
  "total_size_based_usage": 123,
  "asset_usage_offset": 123,
  "size_usage_offset": 123,
  "app_client_asset_usage": 123,
  "app_client_size_usage": 123,
  "usage_stats": [
    {
      "email": "<string>",
      "project_usage_stats": [
        {
          "id": "<string>",
          "name": "<string>",
          "assets_count": 123,
          "size_usage": 123
        }
      ]
    }
  ]
}