diff --git a/app/ScheduledNode/UseCases/GetTodaysSchedule.php b/app/ScheduledNode/UseCases/GetTodaysSchedule.php
index a2835d1..9645c72 100644
--- a/app/ScheduledNode/UseCases/GetTodaysSchedule.php
+++ b/app/ScheduledNode/UseCases/GetTodaysSchedule.php
@@ -25,6 +25,9 @@ class GetTodaysSchedule
         if ($request->date === null) {
             throw new BadRequestException('date is required');
         }
+        if ($request->userId === null) {
+            throw new BadRequestException('userId is required');
+        }
         $date = new DateTimeImmutable($request->date);
         $userId = $request->userId;
         $user = $this->userRepo->find($userId);