Fix first-login username flow

tests/e2e/app.spec.ts

@@ -2,7 +2,10 @@ import { expect, test } from "@playwright/test";
 import { installAppMocks } from "./helpers/mockApp";
 
 test("login redirects into dashboard with mocked auth", async ({ page }) => {
-  await installAppMocks(page, { authenticated: false });
+  await installAppMocks(page, {
+    authenticated: false,
+    authMeNullResponsesAfterLogin: 1,
+  });
 
   await page.goto("/login");
   await expect(page.getByTestId("login-title")).toBeVisible();