post
https://test.bill.pro/api/v1/customers
Create a new customer
When you create a customer with the API, BillPro creates a unique identifier. This is the customer id. BillPro also creates an alphanumeric 10-character customer_id attribute and sets the value.
In the BillPro UI, when you create a customer, you can set your own customer_id. When you edit the customer, you can change this value. If you delete your customer_id value, the BillPro UI will replace it with a generated one. In the UI, you do not have to make the customer_id unique, but we recommend it.
When you create an order for a customer, you add the customer id to the order object. The attribute to set is customer_id, but the value of this attribute must be the id of the customer.