Using credential store reference in legacy security-realm in JBoss EAP managed domain

Issue

• What are the steps to secure the keystore password in legacy security-realm with credential store?

• Getting the following error when configuring credential store reference in legacy security-realm:

  ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([
      ("core-service" => "management"),
      ("security-realm" => "ManagementRealm")
  ]) - failure description: {
      "WFLYCTL0412: Required services that are not installed:" => ["org.wildfly.security.credential-store.CS"],
      "WFLYCTL0180: Services with missing/unavailable dependencies" =>  ["org.wildfly.core.management.security.realm.ManagementRealm.key-manager is missing  [org.wildfly.security.credential-store.CS]"]
  }
   ...
   WFLYCTL0184:    New missing/unsatisfied dependencies:
   service org.wildfly.security.credential-store.my-credential-store (missing) dependents: [service org.wildfly.core.management.security.realm.ManagementRealm.key-manager]