Sentry files are no longer used by Steam in favor of machine auth tokens, and related functionality has been removed
setSentry() is now deprecated. Use the new machineAuthToken property in logOn() instead.
The sentry event is now deprecated. Use the new machineAuthToken event instead.
The singleSentryfile option has been removed, since all machine auth tokens are account-specific
The dontRememberMachine property in logOn() has been removed
If you have been allowing steam-user to automatically manage your sentry files, steam-user will now automatically manage your machine auth tokens, and no change is required from you.
If you have been using the sentry event and setSentry() method, changes have been made in a backward-compatible manner, and your code will continue working until version 5, when these deprecated symbols will be removed.
Web session cookies are now generated using the new auth system, which should be more reliable going forward
Full Changelog: v4.28.9...v4.29.0 View on GitHub