Optional
The ID of the Stripe account that this account belongs to. Only available when account_holder.type is account.
account_holder.type
account
The ID for an Account representing a customer that this account belongs to. Only available when account_holder.type is customer.
customer
Type of account holder that this account belongs to.
The ID of the Stripe account that this account belongs to. Only available when
account_holder.typeisaccount.