Oracle recommends the following best practices for managing users in the Workbench.
Consider adding all users to groups to make managing permissions simpler.
Do not share the predefined admin user account. This makes it difficult to track who has made changes to Workbench. Create an account for each user or group that administers Workbench.
Do not let business users share accounts. Again, this makes it difficult to track changes in Workbench.
Create administrators in addition to the predefined admin. If one administrator loses a password, another administrator needs to reset it.
If you use LDAP, consider creating an LDAP group of administrators to add to the Administrators group in Workbench.