Implement Basic Authentication Middleware (JWT)
Categories: Programming & Development Code Generation & Debugging Web & App Development (Primary) Cybersecurity
Generate JavaScript code for an Express.js middleware function that verifies a JSON Web Token (JWT) sent in the 'Authorization' header (Bearer scheme). If the token is valid, it should attach the decoded payload to `req.user`. If invalid or missing, it should return a 401 or 403 error.
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