committing everything before round 2

internal/auth/service.go

@@ -0,0 +1,16 @@
+package auth
+
+import (
+	"net/http"
+)
+
+
+func requireAuth(next http.Handler) http.Handler {
+    return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+        if !sessionManager.Exists(request.Context(), "userID") {
+            http.Redirect(writer, request, "/login", http.StatusSeeOther)
+            return
+        }
+        next.ServeHTTP(writer, request)
+    })
+}