Source Code: OndemandauthorizationsApi
Create an On-Demand Authorization (API Reference)
$onDemandApi = new DwollaSwagger\OndemandauthorizationsApi($apiClient);
$onDemandAuth = $onDemandApi->createAuthorization();
$onDemandAuth->_links["self"]->href; # => "https://api-sandbox.dwolla.com/on-demand-authorizations/30e7c028-0bdf-e511-80de-0aa34a9b2388"