Create a customer unit alias by customer external ID
Creates an alias that lands signals on this unit: a signal whose externalCustomerId is the alias resolves to this customer and, when it names no customerUnit, to this unit. The alias shares one set of ids with customer external ids and unit ids, unique within the organization and ignoring letter case: an alias another customer holds is refused with 409 EXTERNAL_ID_IN_USE. Addresses the customer by your external customer id.
Authentication
Path parameters
Customer ID from your system, stored on Paid as the customer's externalId.
Your own id for the unit (its externalId), unique within this customer.
Request
Response
Your id of the customer unit signals carrying this alias land on: the unit the alias was created under, or the customer's root unit for a customer-level alias. null only while the customer has no root unit.