How to save password for conference

How to save password for conference room and do not typing it everytime in spark2.7.6?

There is no such option. I have filed a feature request [SPARK-1729] Add an option to save group chat password - IgniteRealtime JIRA

The option added by Alexander and is available since 840 build (keep in mind that the current Spark code is unstable and has bugs) Ignite Realtime: Spark Nightly Builds