String url = "https://api.vk.com/method/users.get"
            + "?uids={user_id}"
            + "&access_token={access_token}"
            + "&fields=uid,first_name,last_name,screen_name,sex,bdate,photo_100,photo_max_orig";

Map<String, List> result = getForObject(url, Map.class, userId, accessToken);

{uid=12345, first_name=xxx, last_name=xxx, sex=2, screen_name=xxx, bdate=1.5, photo_100=xxx, photo_max_orig=xxx}

@Autowired
private UserService userService;

@Autowired
public void configureGlobal(AuthenticationManagerBuilder registry) throws Exception {
    //registry.inMemoryAuthentication().withUser("user").password("abc123").roles("USER");
    //registry.inMemoryAuthentication().withUser("admin").password("root123").roles("ADMIN");
    registry.userDetailsService(userService).passwordEncoder(new Md5PasswordEncoder());
}

@Service
public class UserService implements UserDetailsService {

    @Autowired
    private UserMapper userMapper;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        UserDomain userDomain = userMapper.getUserByEmail(username);
        GrantedAuthority authority = new SimpleGrantedAuthority("ROLE_" + userDomain.getRole());
        return new User(userDomain.getEmail(), userDomain.getPassword(), Arrays.asList(authority));
    }

}

SecurityContextHolder.getContext().setAuthentication(
                new UsernamePasswordAuthenticationToken(
                        user.getUsername(),
                        user.getPassword(),
                        user.getAuthorities()));

UserDetails userDetails = userService.loadUserByOauth2("vk", 12345);
UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
token.setDetails(new WebAuthenticationDetails(request));
SecurityContextHolder.getContext().setAuthentication(token);