Here we would like to draw your attention to RSUSR000 transaction code in SAP. As we know it is being used in the SAP BC-SEC (Security in Basis) component which is coming under BC module (BASIS).RSUSR000 is a transaction code used for Currently Active Users in SAP.
It comes under the package SAIS_BCE.
Transaction RSUSR000 technical data table
|Purpose||Currently Active Users|