Fix for Exception when the server is restarted [RM2713][pgAdmin4]

Hi,

This issue was caused because we recently added session_write_delay in session.

So session won't be written/updated to disk from memory until specified seconds are elapsed.

However we must forcefully write/update session to disk if user loges in or out irrespective of session_write_delay to keep sessions from memory and disk in sync as user logged in status is

kept in session.