feat: decorator for admin endpoint authentication

A cask decorator was added to authenticate users for a certain sensitive endpoint. It uses basic HTTP authentication process. The most important things to note are that we should always ensure an HTTPS connection to this endpoint, we should also protect it against bruteforce attack using nginx rate limiting, and we should use a strong password !

requested review from @cpitclaudel

assigned to @theron

added 1 commit

• afc232f5 - style: removing brackets

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added 2 commits

• c8101946 - fix: compilation error
• e860474f - fix: corrected secret importation

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