add

backend/src/main/java/com/flower/user/AddressRepository.java

@@ -0,0 +1,9 @@
+package com.flower.user;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+
+public interface AddressRepository extends JpaRepository<Address, Long> {
+    List<Address> findByUserId(Long userId);
+}