How to use the httpntlm.ntlm.parseType2Message function in httpntlm

else if (state === STATES.T1_MSG_CREATED) {
            // At this point, we can assume that the type 1 message was sent to the server

            // there can be multiple headers present with key `www-authenticate`.
            // iterate to get the one which has the NTLM hash. if multiple
            // headers have the NTLM hash, use the first one.
            ntlmType2Header = response.headers.find(function (header) {
                return String(header.key).toLowerCase() === WWW_AUTHENTICATE &&
                    header.valueOf().startsWith('NTLM ');
            });

            if (!ntlmType2Header) {
                return done(new Error('ntlm: server did not send NTLM type 2 message'));
            }

            challengeMessage = ntlmUtil.parseType2Message(ntlmType2Header.valueOf(), _.noop);

            if (!challengeMessage) {
                return done(new Error('ntlm: server did not correctly process authentication request'));
            }

            authenticateMessage = ntlmUtil.createType3Message(challengeMessage, {
                domain: domain,
                workstation: workstation,
                username: username,
                password: password
            });

            // Now create the type 3 message, and add it to the request
            auth.set(NTLM_HEADER, authenticateMessage);
            auth.set(STATE, STATES.T3_MSG_CREATED);

function createNTLMServer (options) {
    options = options || {};

    var type2Message = 'NTLM ' +
            'TlRMTVNTUAACAAAAHgAeADgAAAAFgoqiBevywvJykjAAAAAAAAAAAJgAmABWAAAA' +
            'CgC6RwAAAA9EAEUAUwBLAFQATwBQAC0ASgBTADQAVQBKAFQARAACAB4ARABFAFMA' +
            'SwBUAE8AUAAtAEoAUwA0AFUASgBUAEQAAQAeAEQARQBTAEsAVABPAFAALQBKAFMA' +
            'NABVAEoAVABEAAQAHgBEAEUAUwBLAFQATwBQAC0ASgBTADQAVQBKAFQARAADAB4A' +
            'RABFAFMASwBUAE8AUAAtAEoAUwA0AFUASgBUAEQABwAIADmguzCHn9UBAAAAAA==',
        parsedType2Message = ntlmUtils.parseType2Message(type2Message, _.noop),

        username = options.username || 'username',
        password = options.password || 'password',
        domain = options.domain || '',
        workstation = options.workstation || '',

        type1Message = ntlmUtils.createType1Message({
            domain,
            workstation
        }),
        type3Message = ntlmUtils.createType3Message(parsedType2Message, {
            domain,
            workstation,
            username,
            password
        }),