diff --git a/src/main/java/com/example/demo/app/infra/repository/UserRepository.java b/src/main/java/com/example/demo/app/infra/repository/UserRepository.java
index 239dba4..868dd8a 100644
--- a/src/main/java/com/example/demo/app/infra/repository/UserRepository.java
+++ b/src/main/java/com/example/demo/app/infra/repository/UserRepository.java
@@ -16,5 +16,6 @@ public interface UserRepository extends JpaRepository<UserEntity, Long> {
             String mailAddress,
             String password);
 
+    Optional<UserEntity> findByMailAddress(String mailAddress);
 }