Delta changes for SAP administrative users

Hi ,
I am using sapjco library to write an Java code to fetch the users in SAP system.
I am using the BAPI BAPI_USER_GETLIST to get all the users in the system currenlty.
This works fine without issues.

Now i make some changes on the SAP box like (addign a new user "TEST" using su01 ).
Now i want to write code to only fetch the changed user on the SAP system .
I do not want to get all the users on the box.
Is this possible in SAP.

Do i have to make any configurations somewhere.

Regards
Manoj