Firebase Interface: UserImportOptions admin.auth.UserImportOptions interface static Interface representing the user import options needed for importUsers() method. This is used to provide the password hashing algorithm information. Property hash non-null admin.auth.UserImportHash The password hashing information. 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 March 15, 2018.