Authenticator.setDefault(new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("userName", "S&nh@".toCharArray());
            }
        });

final OkHttpClient client = new OkHttpClient.Builder()
                .proxy(new Proxy(Proxy.Type.SOCKS, new InetSocketAddress("127.0.0.123", 1080)))
               . build();

        Authenticator.setDefault(new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(USER, PASSWORD.toCharArray());
            }
        });

        retrofit = new Retrofit.Builder()
                .client(client)
                .baseUrl(URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();