How to use the fabric-client/lib/User.js function in fabric-client

common.rmdir(options.kvs_path);											//delete it
					logger.error('[fcw] MSP in KVS mismatch. KVS has been deleted. Restart the app to try again.');
					process.exit();															//this is terrible, but can't seem to reset client._userContext
				} else {
					logger.info('[fcw] Successfully loaded enrollment from persistence');	//load from KVS if we can
					return user;
				}
			} else {

				// Need to enroll it with the CA
				var tlsOptions = {
					trustedRoots: [options.ca_tls_opts.pem],								//pem cert required
					verify: false
				};
				var ca_client = new CaService(options.ca_url, tlsOptions, options.ca_name);	//ca_name is important for the IBM Cloud service
				member = new User(options.enroll_id);

				logger.debug('enroll id: "' + options.enroll_id + '", secret: "' + options.enroll_secret + '"');
				logger.debug('msp_id: ', options.msp_id, 'ca_name:', options.ca_name);

				// --- Lets Do It --- //
				return ca_client.enroll({
					enrollmentID: options.enroll_id,
					enrollmentSecret: options.enroll_secret

				}).then((enrollment) => {

					// Store Certs
					logger.info('[fcw] Successfully enrolled user \'' + options.enroll_id + '\'');
					return member.setEnrollment(enrollment.key, enrollment.certificate, options.msp_id);
				}).then(() => {

return new Promise((resolve, reject) => {
			if (user && user.isEnrolled()) {
				return resolve(user);
			}

			var member = new User(username);
			var cryptoSuite = client.getCryptoSuite();
			if (!cryptoSuite) {
				cryptoSuite = Client.newCryptoSuite();
				if (userOrg) {
					cryptoSuite.setCryptoKeyStore(Client.newCryptoKeyStore({path: module.exports.storePathForOrg(ORGS[userOrg].name)}));
					client.setCryptoSuite(cryptoSuite);
				}
			}
			member.setCryptoSuite(cryptoSuite);

			// need to enroll it with CA server
			var cop = new copService(caUrl, tlsOptions, ORGS[userOrg].ca.name, cryptoSuite);

			return cop.enroll({
				enrollmentID: username,
				enrollmentSecret: password

async function getMember(username, password, client, userOrg) {
    const caUrl = ORGS[userOrg].ca.url;
    let user = await client.getUserContext(username, true);
    if (user && user.isEnrolled()) {
        return user;
    }

    const member = new User(username);
    let cryptoSuite = client.getCryptoSuite();
    if (!cryptoSuite) {
        cryptoSuite = Client.newCryptoSuite();
        if (userOrg) {
            cryptoSuite.setCryptoKeyStore(Client.newCryptoKeyStore({path: module.exports.storePathForOrg(ORGS[userOrg].name)}));
            client.setCryptoSuite(cryptoSuite);
        }
    }
    member.setCryptoSuite(cryptoSuite);

    // need to enroll it with CA server
    const cop = new copService(caUrl, tlsOptions, ORGS[userOrg].ca.name, cryptoSuite);

    try {
        let enrollment = await cop.enroll({
            enrollmentID: username,

async function getMember(username, password, client, userOrg) {
    const caUrl = ORGS[userOrg].ca.url;
    let user = await client.getUserContext(username, true);
    if (user && user.isEnrolled()) {
        return user;
    }

    const member = new User(username);
    let cryptoSuite = client.getCryptoSuite();
    if (!cryptoSuite) {
        cryptoSuite = Client.newCryptoSuite();
        if (userOrg) {
            cryptoSuite.setCryptoKeyStore(Client.newCryptoKeyStore({path: module.exports.storePathForOrg(ORGS[userOrg].name)}));
            client.setCryptoSuite(cryptoSuite);
        }
    }
    member.setCryptoSuite(cryptoSuite);

    // need to enroll it with CA server
    const cop = new copService(caUrl, tlsOptions, ORGS[userOrg].ca.name, cryptoSuite);

    try {
        let enrollment = await cop.enroll({
            enrollmentID: username,

test('\n\n ** User - constructor set get tests **\n\n', async (t) => {
	testutil.resetDefaults();

	utils.setConfigSetting('crypto-hsm', false);

	const member1 = new User(memberName);
	if (member1.getName() === memberName) {
		t.pass('User constructor set get tests 1: new User getName was successful');
	} else {
		t.fail('User constructor set get tests 1: new User getName was not successful');
	}

	member1.setRoles(roles);
	if (member1.getRoles() &&
		member1.getRoles().indexOf('admin') > -1 &&
		member1.getRoles().indexOf('user') > -1) {
		t.pass('User constructor set get tests 1: setRoles getRoles was successful');
	} else {
		t.fail('User constructor set get tests 1: setRoles getRoles was not successful');
	}

	try {

}).then((enrollment) => {
                    console.log('Successfully enrolled user \'' + username + '\'');

                    member = new User(username, client);
                    return member.setEnrollment(enrollment.key, enrollment.certificate, mspid);
                }).then(() => {
                    return client.setUserContext(member);

}).then((pubKey) => {
				fs.removeSync(path.join(CryptoSuite_ECDSA_AES.getDefaultKeyStorePath(), '0e67f7fa577fd76e487ea3b660e1a3ff15320dbc95e396d8b0ff616c87f8c81a-priv'));

				var poorUser = new User('admin2', _client);
				poorUser.fromString(JSON.stringify(TEST_USER_ENROLLMENT))
				.then(() => {
					t.fail('Failed to catch missing private key expected from a user enrollment object');
				}).catch((err) => {
					t.pass('Successfully caught missing private key expected from a user enrollment object');
				});
			});

}).then((enrollment) => {
					logger.info('Successfully enrolled user \'' + username + '\'');
					member = new User(username);
					member.setCryptoSuite(client.getCryptoSuite());
					return member.setEnrollment(enrollment.key, enrollment.certificate, getMspID(userOrg));
				}).then(() => {
					return client.setUserContext(member);

build: (username, { key, certificate }, MSPID) => {
		const user = new User(username)
		return user.setEnrollment(key, certificate, MSPID).then(() => user)
	},
	register: (caService, { username, affiliation }, adminUser) =>

}).then((enrollment) => {
                    logger.info('Successfully enrolled user \'' + username + '\'');
                    member = new User(username);
                    member.setCryptoSuite(client.getCryptoSuite());
                    return member.setEnrollment(enrollment.key, enrollment.certificate, getMspID(userOrg));
                }).then(() => {
                    return client.setUserContext(member);