src/main/java/com/authlete/jaxrs/AuthleteApiCaller.java
public BackchannelAuthenticationResponse callBackchannelAuthentication(
            MultivaluedMap<String, String> parameters, String clientId, String clientSecret,
            String clientCertificate, String[] clientCertificatePath)
    {
        String params = URLCoder.formUrlEncode(parameters);

        return callBackchannelAuthentication(params, clientId, clientSecret, clientCertificate, clientCertificatePath);
    }
public BackchannelAuthenticationResponse callBackchannelAuthentication(
            MultivaluedMap<String, String> parameters, String clientId, String clientSecret,
            String clientCertificate, String[] clientCertificatePath)
    {
        String params = URLCoder.formUrlEncode(parameters);

        return callBackchannelAuthentication(params, clientId, clientSecret, clientCertificate, clientCertificatePath);
    }
Call Authlete's {@code /api/backchannel/authentication} API.