post https://sandbox.pingpayments.com/payments/api/v1/account_verification_sessions
Account verification is done by using a Account Information Service (AIS),
this should be done when an account lookup and ownership verification is needed for a legal entity.
If a merchant_id is provided and the session was successful, this merchant will be updated with the new legal entity.
When the Account Verification session has reached a terminated state a callback will be sent to the status_callback_url supplied in the request,
containing the new status and a description of why that status was reached.
Callback