Update authentication method

slices/admin/actions/sessions/validate.rb

@@ -0,0 +1,18 @@
+module Admin
+  module Actions
+    module Sessions
+      class Validate < Action
+        include Deps["commands.sessions.validate"]
+
+        def handle(req, res)
+          user_id = validate.(token: req.params[:token])
+          session = req.env["rack.session"]
+
+          session[:user_id] = user_id
+
+          res.redirect_to "/admin"
+        end
+      end
+    end
+  end
+end