Begin new customer subaccount onboarding application

External identifier for the customer subaccount onboarding application. This value has to be unique for each customer subaccount application.

The name of the subaccount.

Optional parameter to try to submit the application if there are no validation errors. This action is irreversible you cannot update the application values after. You can use this to avoid making another api call to POST /v2/onboarding/subaccounts/submit