@Override
    public String listenerName() {
        return listenerName;
    }
Returns SSL session for the connection if security protocol is SASL_SSL. If SSL
mutual client authentication is enabled for the listener, peer principal can be
determined using {@link SSLSession#getPeerPrincipal()}.
clients/src/main/java/org/apache/kafka/common/security/auth/SaslAuthenticationContext.java