RegisteredClient registeredClient = RegisteredClient.withId(UUID.randomUUID().toString())
	.clientId("client-a")
	.clientSecret("{noop}secret")   (1)
	.clientAuthenticationMethod(ClientAuthenticationMethod.CLIENT_SECRET_BASIC)
	.authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE)
	.redirectUri("http://127.0.0.1:8080/authorized")
	.scope("scope-a")
	.clientSettings(ClientSettings.builder().requireAuthorizationConsent(true).build())
	.build();

spring:
  security:
    oauth2:
      client:
        registration:
          client-a:
            provider: spring
            client-id: client-a
            client-secret: secret
            authorization-grant-type: authorization_code
            redirect-uri: "http://127.0.0.1:8080/authorized"
            scope: scope-a
        provider:
          spring:
            issuer-uri: http://localhost:9000

public class RegisteredClient implements Serializable {
	private String id;  (1)
	private String clientId;    (2)
	private Instant clientIdIssuedAt;   (3)
	private String clientSecret;    (4)
	private Instant clientSecretExpiresAt;  (5)
	private String clientName;  (6)
	private Set<ClientAuthenticationMethod> clientAuthenticationMethods;    (7)
	private Set<AuthorizationGrantType> authorizationGrantTypes;    (8)
	private Set<String> redirectUris;   (9)
	private Set<String> postLogoutRedirectUris; (10)
	private Set<String> scopes; (11)
	private ClientSettings clientSettings;  (12)
	private TokenSettings tokenSettings;    (13)

	...

}

@Bean
public RegisteredClientRepository registeredClientRepository() {
	List<RegisteredClient> registrations = ...
	return new InMemoryRegisteredClientRepository(registrations);
}

@Bean
public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http) throws Exception {
	OAuth2AuthorizationServerConfigurer authorizationServerConfigurer =
		new OAuth2AuthorizationServerConfigurer();
	http.apply(authorizationServerConfigurer);

	authorizationServerConfigurer
		.registeredClientRepository(registeredClientRepository);

	...

	return http.build();
}

public class OAuth2Authorization implements Serializable {
	private String id;  (1)
	private String registeredClientId;  (2)
	private String principalName;   (3)
	private AuthorizationGrantType authorizationGrantType;  (4)
	private Set<String> authorizedScopes;   (5)
	private Map<Class<? extends OAuth2Token>, Token<?>> tokens; (6)
	private Map<String, Object> attributes; (7)

	...

}

@Bean
public OAuth2AuthorizationService authorizationService() {
	return new InMemoryOAuth2AuthorizationService();
}

@Bean
public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http) throws Exception {
	OAuth2AuthorizationServerConfigurer authorizationServerConfigurer =
		new OAuth2AuthorizationServerConfigurer();
	http.apply(authorizationServerConfigurer);

	authorizationServerConfigurer
		.authorizationService(authorizationService);

	...

	return http.build();
}

public final class OAuth2AuthorizationConsent implements Serializable {
	private final String registeredClientId;    (1)
	private final String principalName; (2)
	private final Set<GrantedAuthority> authorities;    (3)

	...

}

@Bean
public OAuth2AuthorizationConsentService authorizationConsentService() {
	return new InMemoryOAuth2AuthorizationConsentService();
}

@Bean
public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http) throws Exception {
	OAuth2AuthorizationServerConfigurer authorizationServerConfigurer =
		new OAuth2AuthorizationServerConfigurer();
	http.apply(authorizationServerConfigurer);

	authorizationServerConfigurer
		.authorizationConsentService(authorizationConsentService);

	...

	return http.build();
}

public interface OAuth2TokenContext extends Context {

	default RegisteredClient getRegisteredClient() ...  (1)

	default <T extends Authentication> T getPrincipal() ... (2)

	default AuthorizationServerContext getAuthorizationServerContext() ...    (3)

	@Nullable
	default OAuth2Authorization getAuthorization() ...  (4)

	default Set<String> getAuthorizedScopes() ...   (5)

	default OAuth2TokenType getTokenType() ...  (6)

	default AuthorizationGrantType getAuthorizationGrantType() ...  (7)

	default <T extends Authentication> T getAuthorizationGrant() ...    (8)

	...

}

@Bean
public OAuth2TokenGenerator<?> tokenGenerator() {
	JwtEncoder jwtEncoder = ...
	JwtGenerator jwtGenerator = new JwtGenerator(jwtEncoder);
	OAuth2AccessTokenGenerator accessTokenGenerator = new OAuth2AccessTokenGenerator();
	OAuth2RefreshTokenGenerator refreshTokenGenerator = new OAuth2RefreshTokenGenerator();
	return new DelegatingOAuth2TokenGenerator(
			jwtGenerator, accessTokenGenerator, refreshTokenGenerator);
}

@Bean
public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http) throws Exception {
	OAuth2AuthorizationServerConfigurer authorizationServerConfigurer =
		new OAuth2AuthorizationServerConfigurer();
	http.apply(authorizationServerConfigurer);

	authorizationServerConfigurer
		.tokenGenerator(tokenGenerator);

	...

	return http.build();
}

@Bean
public OAuth2TokenGenerator<?> tokenGenerator() {
	JwtEncoder jwtEncoder = ...
	JwtGenerator jwtGenerator = new JwtGenerator(jwtEncoder);
	OAuth2AccessTokenGenerator accessTokenGenerator = new OAuth2AccessTokenGenerator();
	accessTokenGenerator.setAccessTokenCustomizer(accessTokenCustomizer());
	OAuth2RefreshTokenGenerator refreshTokenGenerator = new OAuth2RefreshTokenGenerator();
	return new DelegatingOAuth2TokenGenerator(
			jwtGenerator, accessTokenGenerator, refreshTokenGenerator);
}

@Bean
public OAuth2TokenCustomizer<OAuth2TokenClaimsContext> accessTokenCustomizer() {
	return context -> {
		OAuth2TokenClaimsSet.Builder claims = context.getClaims();
		// Customize claims

	};
}

@Bean
public OAuth2TokenGenerator<?> tokenGenerator() {
	JwtEncoder jwtEncoder = ...
	JwtGenerator jwtGenerator = new JwtGenerator(jwtEncoder);
	jwtGenerator.setJwtCustomizer(jwtCustomizer());
	OAuth2AccessTokenGenerator accessTokenGenerator = new OAuth2AccessTokenGenerator();
	OAuth2RefreshTokenGenerator refreshTokenGenerator = new OAuth2RefreshTokenGenerator();
	return new DelegatingOAuth2TokenGenerator(
			jwtGenerator, accessTokenGenerator, refreshTokenGenerator);
}

@Bean
public OAuth2TokenCustomizer<JwtEncodingContext> jwtCustomizer() {
	return context -> {
		JwsHeader.Builder headers = context.getJwsHeader();
		JwtClaimsSet.Builder claims = context.getClaims();
		if (context.getTokenType().equals(OAuth2TokenType.ACCESS_TOKEN)) {
			// Customize headers/claims for access_token

		} else if (context.getTokenType().getValue().equals(OidcParameterNames.ID_TOKEN)) {
			// Customize headers/claims for id_token

		}
	};
}

@Bean
public SessionRegistry sessionRegistry() {
	return new SessionRegistryImpl();
}

@Bean
public HttpSessionEventPublisher httpSessionEventPublisher() {
	return new HttpSessionEventPublisher();
}