microservices/03-resource-server/src/main/java/com/example/resourceserver/security/UserRepository.java


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package com.example.resourceserver.security;

import java.util.Optional;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository<User, Long> {
    Optional<User> findByUsername(String username);
}