How to use the teslajs.login function in teslajs

iface.question("MyTesla Password: ", (pass) => {
		TeslaJS.login(email, pass, (err, results) => {
			if (err) {
				process.stderr.write(err.message + "\n");
				process.exit(2);
			} else if (!results.refreshToken || !results.authToken) {
				process.stderr.write("Malformed response from MyTesla login server. Was your password wrong?\n");
				process.exit(3);
			} else {
				Config.tesla.encryptedToken = McCrypto.encrypt(McCrypto.Cipher.AES256CTRWithHMAC, process.env.ENCRYPTION_KEY, results.refreshToken).toString('base64');
				FS.writeFileSync(__dirname + "/config.json", JSON.stringify(Config, undefined, "\t"));
				console.log("Authenticated successfully. Refresh token has been encrypted and saved to config.json");

				TeslaJS.vehicles({"authToken": results.authToken}, (err, vehicles) => {
					if (err) {
						process.stderr.write("Cannot retrieve list of vehicles: " + err.message + "\n");
						process.exit(4);
					} else {

return new Promise((resolve, reject) => {
            tjs.login(username, password, function (err, result) {                
                if (err) {
                    reject(err)
                    return
                }
                resolve(result.authToken)
            })
        })
    },