I’m setting up a playwright project and trying to store Basic auth for reusability in my tests using dependencies.
The setup always passes, yet the example spec fails with the error page.goto: net::ERR_INVALID_AUTH_CREDENTIALS at https://the-internet.herokuapp.com/basic_auth
My config file:

// @ts-check
const {defineConfig, devices} = require('@playwright/test');

/**
 * Read environment variables from file.
 * https://github.com/motdotla/dotenv
 */
// require('dotenv').config();

/**
 * @see https://playwright.dev/docs/test-configuration
 */
module.exports = defineConfig({
  testDir: './tests',
  /* Run tests in files in parallel */
  fullyParallel: true,
  /* Fail the build on CI if you accidentally left test.only in the source code. */
  forbidOnly: !!process.env.CI,
  /* Retry on CI only */
  retries: process.env.CI ? 2 : 0,
  /* Opt out of parallel tests on CI. */
  workers: process.env.CI ? 1 : undefined,
  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
  reporter: 'html',
  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
  use: {
    /* Base URL to use in actions like `await page.goto('/')`. */
    baseURL: 'https://the-internet.herokuapp.com/basic_auth',

    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
    trace: 'on-first-retry',
  },

  /* Configure projects for major browsers */
  projects: [
    {
      name: 'setup',
      testDir: './',
      testMatch: 'globalSetup.js'
    },
    {
      name: 'testrun',
      dependencies: ['setup'],
      use: { storageState: './LoginAuth.json' }
    },
],
}

globalSetup: 
test('setup', async ({ page }) => {
    const authHeaders = 'Basic ' + Buffer.from('admin:admin').toString('base64');
    await page.setExtraHTTPHeaders({ Authorization : authHeaders })
    await page.goto('');
    await expect(page.getByText('Congratulations!')).toBeVisible();
    await page.context().storageState({ path: './LoginAuth.json' })
})

my spec: 
test('new fckn test', async ({page}) => {
  await page.goto('');

  await expect(page.getByText('Congratulations!')).toBeVisible();
})

I tried the old way as well already (function globalSetup()) and a few different variations, yet nothing works. What am I doing wrong?