Hi Muhammad,
Expression editor function 'username' should work for this.
1. I created a transaction parameter as 'Logon' with string type.
2. Used 'Assignment' action block and assigned 'username' expression to 'Logon' parameter.
Image may be NSFW.
Clik here to view.
3. Then used a 'Tracer' action block to check 'Logon' value and I got my Logon ID.
Image may be NSFW.
Clik here to view.
Regards,
Sai Vellanki.
