spring oauth2, unable to retrieve user info - spring

Question

couldn't find a doc which illustrates how to use access_token to get user info.
How can I make a such endpoint?
I see when I access the /user endpoint OAuth2AuthenticationProcessingFilter is not included.
I think I messed up something below
#Configuration
#EnableWebSecurity
#Order(2)
// after ResourceServerConfigurerAdapter
public class SecurityConfig extends WebSecurityConfigurerAdapter {
#Override
protected void configure(HttpSecurity http) throws Exception {
http
// https://stackoverflow.com/questions/26387003/how-to-make-spring-boot-never-issue-session-cookie
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
.authorizeRequests()
.antMatchers("/", "index", "/login**", "/webjars/**")
.permitAll()
.and().exceptionHandling()
.authenticationEntryPoint(authenticationEntryPoint)
.accessDeniedHandler(oAuth2FailedHandler)
.and().csrf().disable().authorizeRequests()
.and().addFilterBefore(new CORSFilter(), BasicAuthenticationFilter.class); }
}
I also have..
#Order(3)
#Configuration
#EnableResourceServer
#Slf4j
public class OAuth2ResourceServerConfig extends ResourceServerConfigurerAdapter {
#Override
public void configure(final ResourceServerSecurityConfigurer config) {
config.tokenServices(tokenServices());
}
#Override
public void configure(HttpSecurity http) throws Exception {
// super.configure(http);
log.info("hello OAuth2ResourceServerConfig:configure");
http
.authorizeRequests().anyRequest().authenticated();
}
#Bean
#Primary
public DefaultTokenServices tokenServices() {
final DefaultTokenServices defaultTokenServices = new DefaultTokenServices();
defaultTokenServices.setTokenStore(tokenStore());
return defaultTokenServices;
}
// JDBC token store configuration
#Bean
public DataSource dataSource() {
final DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
dataSource.setUrl(env.getProperty("spring.datasource.url"));
dataSource.setUsername(env.getProperty("spring.datasource.username"));
dataSource.setPassword(env.getProperty("spring.datasource.password"));
return dataSource;
}
#Bean
public TokenStore tokenStore() {
return new JdbcTokenStore(dataSource());
}
}
#Configuration
//#PropertySource({ "classpath:persistence.properties" }) #EnableAuthorizationServer
#Slf4j
public class OAuth2AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {
// ....
}

Answer 1

Add a REST controller with something like this:
#RequestMapping("/user")
public #ResponseBody Principal user(Principal user) {
return user;
}
Then you can call it, using your access token in the Authorization header.