@Service
class UserService {
    @Autowired
    private lateinit var userRepository: UserRepository

    @Autowired
    private lateinit var bCryptPasswordEncoder: BCryptPasswordEncoder

    fun create(user: User): User {
        user.password = bCryptPasswordEncoder.encode(user.password)
        return userRepository.save(user)
    }

    fun myself(): String? {
        return userRepository.findByEmail(getCurrentUserEmail())?.fullName
    }

    private fun getCurrentUserEmail(): String? {
        val user = SecurityContextHolder.getContext().authentication.principal as UserDetailsImpl
        return user.username
    }

}