--- /dev/null
+package de.juplo.kafka.outbox.polling;
+
+import org.springframework.data.jdbc.repository.query.Query;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.query.Param;
+
+public interface UserRepository extends CrudRepository<User, Long> {
+ @Query("select * from User u where u.username = :username")
+ User findByUsername(@Param("username") String username);
+}