security/subsystem/src/main/java/org/jboss/as/security/vault/VaultSession.java
public char[] retrieveSecuredAttribute(String vaultBlock, String attributeName) throws Exception {
        return vault.retrieve(vaultBlock, attributeName, null);
    }
public char[] retrieveSecuredAttribute(String vaultBlock, String attributeName) throws Exception {
        return vault.retrieve(vaultBlock, attributeName, null);
    }
Retrieves secured attribute from specified vault block with specified attribute name. This method can be called only after successful
startVaultSession() call.

@param vaultBlock security vault block
@param attributeName Attribute name stored in security vault
@return value of secured attribute if exists, otherwise null
@throws Exception