To replace the hardcoded user name "QPGMR" in this line of script with the name of the current framework user:
 
SETVALUE("utxtUserName", "QPGMR");
 
 
Select "QPGMR" (including the quotes), right-click and select the Session Control and then User Name option:

 
The constant "QPGMR" is now replaced with the substitution value for the current Framework user:
 
SETVALUE("utxtUserName", objUser.Name);