fix lint errors

Author: jeremyphilemon

tests/authentication.test.ts

@@ -2,7 +2,7 @@ import { test, expect } from '@playwright/test';
 import { getUnixTime } from 'date-fns';
 
 const testEmail = `auth-${getUnixTime(new Date())}@playwright.com`;
-const testPassword = process.env.TEST_USER_PASSWORD!;
+const testPassword = process.env.TEST_USER_PASSWORD ?? '';
 
 test.describe('authentication', () => {
   test('redirect to login page when unauthenticated', async ({ page }) => {

tests/chat.test.ts

@@ -5,7 +5,7 @@ type Fixtures = {
 };
 
 const testEmail = `[email protected]`;
-const testPassword = process.env.TEST_USER_PASSWORD!;
+const testPassword = process.env.TEST_USER_PASSWORD ?? '';
 
 const test = baseTest.extend<Fixtures>({
   authenticatedPage: async ({ page }, use) => {