config/src/main/java/org/springframework/security/config/annotation/web/builders/HttpSecurity.java
public OAuth2ClientConfigurer<HttpSecurity> oauth2Client() throws Exception {
		OAuth2ClientConfigurer<HttpSecurity> configurer = getOrApply(new OAuth2ClientConfigurer<>());
		this.postProcess(configurer);
		return configurer;
	}
public OAuth2ClientConfigurer<HttpSecurity> oauth2Client() throws Exception {
		OAuth2ClientConfigurer<HttpSecurity> configurer = getOrApply(new OAuth2ClientConfigurer<>());
		this.postProcess(configurer);
		return configurer;
	}
Configures OAuth 2.0 Client support.

@since 5.1
@see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-1.1">OAuth 2.0 Authorization Framework</a>
@return the {@link OAuth2ClientConfigurer} for further customizations
@throws Exception