Firebase Interface: SessionCookieOptions admin.auth.SessionCookieOptions interface static Interface representing the session cookie options needed for the createSessionCookie() method. Property expiresIn number The session cookie custom expiration in milliseconds. The minimum allowed is 5 minutes and the maxium allowed is 2 weeks. 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 April 5, 2018.