git clone https://github.com/ArnaudDenoyelle/sscce-spring-oauth2.git

mvn spring-boot:run

http://localhost:9999/uaa/oauth/authorize?response_type=code&client_id=acme&redirect_uri=http://example.com

-user : user
-password : password

@SpringBootApplication
public class AuthserverApplication extends WebMvcConfigurerAdapter {

    public static void main(String[] args) {
        SpringApplication.run(AuthserverApplication.class, args);
    }

    @Configuration
    @EnableAuthorizationServer
    protected static class OAuth2Config extends AuthorizationServerConfigurerAdapter {

        @Autowired
        private AuthenticationManager authenticationManager;

        @Override
        public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
            endpoints.authenticationManager(authenticationManager);
        }

        @Override
        public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
            clients.inMemory()
                    .withClient("acme")
                    .secret("acmesecret")
                    .authorizedGrantTypes("authorization_code", "refresh_token", "password").scopes("openid");
        }

    }
}