Campaigns
Get campaign by ID
campaigns.retrieve(id) -> CampaignRetrieveResponse { campaign }
GET/campaigns/{id}
Cancel a campaign
campaigns.cancel(id) -> CampaignCancelResponse { success }
POST/campaigns/{id}/cancel
Get campaign rows
campaigns.get_rows(id, **kwargs) -> CampaignGetRowsResponse { page, page_size, rows, total }
GET/campaigns/{id}/rows
Export campaign rows
campaigns.export_rows(id) -> CampaignExportRowsResponse { csv, filename }
GET/campaigns/{id}/export