[Interface]`UserDetailsService`

@Service
@Slf4j
@AllArgsConstructor
public class CustomUserServiceImp implements UserDetailsService {

  private final UserRepository userRepository;

  private final AuthoritiesRepository authoritiesRepository;

  @Override
  public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

    User user = userRepository.findByUsername(username);
    if ("null".equals(user)) {
      throw new UsernameNotFoundException("not found user:" + username);
    }

    CustomUser customUser = new CustomUser();
    customUser.setUsername(user.getUsername());
    customUser.setPassword(user.getPassword());
    customUser.setAuthorities(getAuthorities(username));
    customUser.setEnabled(true);
    customUser.setAccountNonExpired(true);
    customUser.setAccountNonLocked(true);
    customUser.setCredentialsNonExpired(true);
    return customUser;
  }

  public Collection<GrantedAuthority> getAuthorities(String username) {
    List<Authority> authList = authoritiesRepository.findByUsername(username);
    List<GrantedAuthority> authorities = new ArrayList<>();
    for (Authority authority : authList) {
      authorities.add(new SimpleGrantedAuthority(authority.getAuthority()));
    }
    return authorities;
  }
}

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