I want to replace a manual sign-in routine with a single button press. When the user clicks the button, an internal API should automatically pull the target URL, login ID, and password from our database and complete the sign-in on a web application that uses a standard HTML login form. Here is what I need built: • A lightweight API endpoint that receives the button event, queries the database for the correct credentials, and returns them securely. • A headless browser or equivalent automation (e.g., Selenium, Playwright, Puppeteer—use whichever you prefer) that opens the URL, fills in the username and password fields, submits the form, and confirms success. • Error handling for wrong credentials, time-outs, or changed page structure. • Clear setup instructions plus concise documentation of the code so my team can maintain it. A working prototype running on my machine or a small cloud instance is enough for the first delivery; once verified, I will ask for any polish or minor fixes. I am flexible on language—Python, Node.js, or similar is fine—as long as it is reliable and easy to deploy. If this sounds straightforward to you, let’s get it built.