UserDetailsServiceAdapter.java

public class UserDetailsServiceAdapter implements UserDetailsService {
    
    @Autowired
    private AccountRepository accountRepository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Account account = accountRepository.findByEmail(username);
        if (account == null) {
            throw new UsernameNotFoundException(username);
        }
        return new UserDetailsAdapter(account);
    }
}