How to use the vsce.createVSIX function in vsce

export async function publish(options: PublishOptions = {}): Promise {
    if (!options.registryUrl) {
        options.registryUrl = process.env.OVSX_REGISTRY_URL;
    }
    if (!options.pat) {
        options.pat = process.env.OVSX_PAT;
    }
    if (!options.extensionFile) {
        options.extensionFile = await createTempFile({ postfix: '.vsix' });
        await createVSIX({
            cwd: options.packagePath,
            packagePath: options.extensionFile,
            baseContentUrl: options.baseContentUrl,
            baseImagesUrl: options.baseImagesUrl,
            useYarn: options.yarn
        });
        console.log(); // new line
    }
    const registry = new Registry({ url: options.registryUrl });
    const extension = await registry.publish(options.extensionFile, options.pat);
    if (extension.error) {
        throw new Error(extension.error);
    }
    console.log(`\ud83d\ude80  Published ${extension.publisher}.${extension.name} v${extension.version}`);
}

gulp.task('vsce-package', () => {
    const cliOptions = minimist(process.argv.slice(2));
    const packageOptions = {
        packagePath: cliOptions.packagePath
    };

    return vsce.createVSIX(packageOptions);
});