Platform Release 17 August 2017

Added key field to Customer

• [API] Customers have a new optional field key that allows clients to specify a unique identifier for the customer. Keys can be set during creation of the customer or afterwards by the new update action Set Key. Now customers can also be retrieved, updated and deleted by key. JVM SDKv1.22.0 PHP SDKv2.2.0 iOS SDKv0.7.0