post
https://sandbox.uk.rootplatform.com/v1/insurance/applications/create-aggregated
Creates a quote and an application in a single call, stopping before policy issuance. This is the application-only counterpart to the issue an aggregated policy endpoint — use it when you want to prepare an application (quote + application) without yet issuing a policy. Issue the policy afterwards via the create a policy endpoint using the returned application_id.