Changes to GET /v1/billing-accounts

the response's body type changed from no type to object for status default

added the optional property debug to the response with the default status

added the optional property details to the response with the default status

added the optional property request to the response with the default status

added the required property code to the response with the default status

added the required property err to the response with the default status

added the required property status to the response with the default status

endpoint deprecated

added the new billing_member enum value to the billing_accounts/items/role response property for the response status 200