Default security for basic user in Appian

According to the smart service's documentation, you should leave the Administrators field blank, leave the Viewers field blank, and enter the user as the only Editor if you'd like the user to be able to edit his/her own information.
docs.appian.com/.../Modify_User_Security_Smart_Service.html

There is no such default security option. Once you modify user security it gets permanently stored in Appian profile manager.
Please consider following options:
1. If the reason for modifying user security is to grant access of a process, then modify process instance security instead. This one is a temporary change and does not affect process model
2. If you anyway need to change user security and roll it back, please consider taking its backup in your process instance or in database.

Thanks @Lakshmi I have tried the same it seems giving the expected result.