config/src/main/java/org/springframework/security/config/annotation/web/configuration/WebSecurityConfigurerAdapter.java
protected UserDetailsService userDetailsService() {
		AuthenticationManagerBuilder globalAuthBuilder = context
				.getBean(AuthenticationManagerBuilder.class);
		return new UserDetailsServiceDelegator(Arrays.asList(
				localConfigureAuthenticationBldr, globalAuthBuilder));
	}
protected UserDetailsService userDetailsService() {
		AuthenticationManagerBuilder globalAuthBuilder = context
				.getBean(AuthenticationManagerBuilder.class);
		return new UserDetailsServiceDelegator(Arrays.asList(
				localConfigureAuthenticationBldr, globalAuthBuilder));
	}
protected UserDetailsService userDetailsService ( ) { AuthenticationManagerBuilder globalAuthBuilder = context . getBean ( AuthenticationManagerBuilder . class ) ; return new UserDetailsServiceDelegator ( Arrays . asList ( localConfigureAuthenticationBldr , globalAuthBuilder ) ) ; }
Allows modifying and accessing the {@link UserDetailsService} from
{@link #userDetailsServiceBean()} without interacting with the
{@link ApplicationContext}. Developers should override this method when changing
the instance of {@link #userDetailsServiceBean()}.

@return the {@link UserDetailsService} to use
Allows modifying and accessing the { @link UserDetailsService } from { @link #userDetailsServiceBean () } without interacting with the { @link ApplicationContext } . Developers should override this method when changing the instance of { @link #userDetailsServiceBean () } .