Click below — you'll be taken to Schwab's login page in this tab. After signing in, your browser will land on a "connection refused" error page at 127.0.0.1 — that's normal and expected.
On the "connection refused" page, immediately copy the full URL from the address bar. It starts with 127.0.0.1/?code=C0... — ⚠ the code expires in ~60 seconds, so don't wait.
3
Come back here and paste
Hit the browser back button or navigate back to localhost:8000/auth, paste the full URL below and click Authenticate.