I need a straightforward script or lightweight app that lets me upload a plain-text (.txt) file of email addresses and tells me, for each one, whether it is already registered on Robinhood. Scope • Input: a text file I provide, one email per line. • Process: automatically query Robinhood in any reliable way (API, browser automation, or other proven method) to determine if the address is tied to an existing account. • Output: a simple report—CSV or TXT—flagging each address as “registered” or “not registered,” plus a summary count. Must-haves • Handles files with thousands of emails without freezing. • Clear documentation so I can run it again later (Python preferred, but I’m open to other languages if setup remains easy). • Graceful handling of rate limits, captchas, or login requirements; no personal Robinhood credentials from me. Nice-to-haves • Progress bar or live status while the list is being checked. • Option to append results as new columns to the original file. Deliverables 1. Source code with brief README. 2. One run demonstrating the tool on a small sample list (screenshots or short video). I’m ready to move quickly and will be available to test builds as soon as you have something runnable.