how to change the radius default "testing123" password

I changed all instances of the password "testing123", to a random password on both the StrongSwan server and the Radius server, and restarted the strongswan and radiusd services. However, this broke the connection to authenticate to the LDAP server, so I had to put it back to "testing123" to get it to work again. How can I change the radius default "testing123" password? Is there a command I need to run to do this? Thanks for any help with this.