UsageCustomerRef
The customer, by customerId or externalCustomerId. When both are given, customerId is used.
- customerType: string
Id The customer's Spondo Billing ID.
- externalType: string
Customer Id Your ID for the customer (matched case-insensitively), or one of the customer's aliases. A renamed customer's old ID stays an alias, so usage sent under it still reaches the customer.
