Products Actions Reference CustomerInfoProperty Property of customer info that the app can request for. Enums CUSTOMER_INFO_PROPERTY_UNSPECIFIED Unspecified. EMAIL Email address. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated May 17, 2017.