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krzysdz
approved these changes
Nov 13, 2026
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The route-specific example calls
res.sendStatus(400)without returning, so the handler keeps going and callsres.send()too. Running it as written with express 5 and posting a form withoutusernamegives a 400 followed byERR_HTTP_HEADERS_SENT: Cannot set headers after they are sent to the client. Addingreturnfixes both handlers.