Firebird 3 always provides a SEC$USERS table, either from the server wide
user database OR from the secondary user database.
But for user management, I would like to know if the users list comes
from the server-wide or from a secondary database, it would be more clear to the users
of Database Workbench to see the difference if there's NO "Users" node
for a database which users server side users, and there is a "Users" node
for databases that use a secondary user database.