Using AMQ 7.6 Broker template on Openshift 4, it is allowing anonymous access to the broker

Issue

I have AMQ Broker 7.6 deployed using Application template[1] with persistence and custom broker configuration enabled. I altered the secret to change the credentials for AMQ, which are working fine. But the issue is that it's even accepting admin:admin as username:password which is a major security loop hole. Currently, is there any way to disable that?

We wanted to opt for the operator but couldn't leverage on that because it doesn't support customer configurations for broker via broker.xml file.

[1] https://access.redhat.com/documentation/en-us/red_hat_amq/7.6/html-single/deploying_amq_broker_on_openshift/index#deploying_broker-on-ocp-using-templates_broker-ocp