I rely on the Juno mobile app to register daily attendance, which means logging in for each user and physically scanning a time-sensitive QR code. I have already seen a web solution that handles this entire flow in a single click—holding multiple credentials, fetching the live QR, and instantly marking everyone present—but I only have access to the working site, not its source. Here’s what I need you to build from scratch: a small web application that securely stores roughly ten Juno usernames and passwords, signs each account in, captures the live QR that Juno expects, submits it, and confirms that attendance is recorded for every user in one pass. I can show you the existing site in action so you can observe calls, timing, and responses; you will then recreate the logic, UI, and automation without copying code. Key expectations • All credentials must be encrypted at rest and never exposed in logs. • One “Mark Attendance” button (or scheduled trigger) should process every profile and surface clear success/failure feedback. • The solution should run headless—Puppeteer/Selenium, Playwright, or a direct Juno API if you discover one—so the browser window never has to be open on my machine. • A lightweight dashboard is enough; no individual user areas are required, just my admin view. • Please provide clean, well-commented source code plus a short deployment guide so I can host it on a typical VPS (Ubuntu, Docker image, or similar). I can supply test logins, video walkthroughs of the current site, and the daily QR flow so you have everything you need to replicate behaviour. Let me know which stack you favour and how long you expect for the first working prototype.