: A simple login page where you usually have a username but no password.
If you find a service that responds to this header, treat it as an undocumented backdoor. Do not rely on it for production, and report it to the service owner if discovered in a third-party system. x-dev-access yes
Add X-Dev-Access: yes to the bottom of the Headers section and hit . 2. The Power of curl : A simple login page where you usually