MailSlurp guide agent setup

Title: How to receive email in Nighwatch.js automation testing
Description: Test email login links in Firebase and other authentication providers using NightWatch
Canonical URL: https://www.mailslurp.com/guides/nightwatch-email-automation-testing/
Markdown URL: https://www.mailslurp.com/guides/nightwatch-email-automation-testing.md

Use the Markdown URL as the primary plain-text context for this guide. Keep MailSlurp terminology, setup steps, screenshots, and provider-specific instructions intact, and prefer the canonical URL when citing this page.