Create a subaccount

This POST endpoint is used to initiate create a subaccount under your organization.
You can use this endpoint to establish subaccounts which you can use to transact through the MassPay platform.
To use this endpoint, you need to provide the required parameters in the request Body, including company_name, company_dba, incorporation_date, and other corporate related details.
The endpoint will then return a successful subaccount token for the newly created entity. The response will contain a JSON object indicating the status of the request and any relevant subaccount details.