Code Flow on passport authentication ->
-- passport.checkAuthentication ⬇ Page- /auth/login : POST ⬇ Route- /auth ⬇ -- passport.authenticate -- passport.serializeUser() ⬇ Controller- auth_controller.login ⬇ -- passport.deserializeUser() -- passport.setAuthentication ⬇ Route - /users/profile ⬇ -- passport.checkAuthentication ⬇ Controller- users_controller.profilePage ⬇ -- passport.setAuthentication