@@ -12,12 +12,17 @@ )
 
 type user struct{}
 
+var (
+	ErrCannotDetermineUser = ihttp.NewError("cannot determine user", http.StatusInternalServerError)
+	ErrRenderFailure       = ihttp.NewError("failed to render page", http.StatusInternalServerError)
+)
+
 func (app *App) WithUserContext(fn ihttp.HandleFunc) ihttp.HandleFunc {
 	return func(w http.ResponseWriter, r *http.Request) ihttp.Error {
 		ctx := r.Context()
 		who, err := app.localClient.WhoIs(ctx, r.RemoteAddr)
 		if err != nil {
-			return ihttp.InternalServerError("cannot determine user", err)
+			return ErrCannotDetermineUser
 		}
 
 		return fn(w, r.WithContext(
@@ -35,7 +40,7 @@ },
 		User: user.LoginName,
 	}).Render(w)
 	if err != nil {
-		return ihttp.InternalServerError("Failed to render index page", err)
+		return ErrRenderFailure
 	}
 
 	return nil