Then you would need to follow the KB that Aravind mentioned to accomplish that. The KB does mention setting another user as well so for you, use these steps:
Note: the user name of dradmin is assumed as it is the default.
1) Login to the Data Aggregator server
2) Change directory to /opt/IMDataAggregator/scripts/common.tools.encryption
3) ./doEncryption.sh dradmin NEWPASSWORD
4) Replace password in dbconnection.cfg with new password provided by script.
5) Login into the Data Repository server as OS user dradmin
6) /opt/verica/bin/vsql -U dradmin -w <old password>
7) ALTER USER dradmin IDENTIFIED BY 'newpassword'