Создание метода public void configAuthentication(AuthenticationManag­erBuilder auth)

@Service
public class AdministrationServiceImpl implements AdministrationService, UserDetailsService {

@Override
    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
        return null;
    }

@Service
public class AdministrationServiceImpl implements AdministrationService, UserDetailsService {
    @Autowired private AdministrationRepository administrationRepository;
    @Override
    public List<Administration> getAll() {
        return administrationRepository.findAll();
    }

    @Override
    public User findUserByName(String name) {
        TypedQuery<User> query = em.createQuery("SELECT u FROM User u WHERE u.username = :name", User.class)
                .setParameter("name", name);
        return query.getSingleResult();
    }

   @Override
    public UserDetails loadUserByUsername(String name) throws UsernameNotFoundException {
        return userDAO.findUserByName(name);
    }

import com.cat.server.entity.Administration;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
 
public interface AdministrationRepository extends JpaRepository<Administration, Long> {
    @Query("SELECT Administration FROM Administration WHERE login = :login")
    Administration findAdminByName(@Param("login") String login);
}

@Service
public class AdministrationServiceImpl implements AdministrationService, UserDetailsService {
    @Autowired private AdministrationRepository administrationRepository;
    @Override
    public UserDetails loadUserByUsername(String login) throws UsernameNotFoundException {
        return administrationRepository.findAdminByName(login);
    }}