If we want to build a system with user modules, Authentication and Authorization are something that we can never ignore, though they could be fuzzy to understand.Authentication (from Greek: αὐθεντικÏŒς authentikos, “real, genuine”, from αὐθέντης authentes, “author”) is the act of proving an assertion, such as the identity of a computer system user — from wikiAuthorization is the function of specifying access rights/privil...