I want to use global variables declared in wdio.conf.js file into my test files. in below test I am using UserName, Password, PageTile. I want to use them via wdio.conf.js file globaly??

describe('My Store|Automationpractice.com', () => {

it('should go to url and login with valid credentials', async () => {

   
    await LoginPage.open();
    await expect(browser).toHaveTitle('My Store');
    await LoginPage.signInbtn.click();
    await expect(browser).toHaveTitle('Login - My Store');
    await LoginPage.login('UserName','Password');
    await expect(browser).toHaveTitle('My account - My Store');
    await browser.pause(5000);
});