AuthenticationPrincipal is empty when using EnableWebSecurity

Question

As of Spring Security doc: 34.1 @EnableWebMvcSecurity states, the @EnableWebMvcSecurity was replaced by @EnableWebSecurity.

But when I try

Answer 1

I haven't tried it, but this should work for you:

@Configuration
public class MvcConfig extends WebMvcConfigurerAdapter {

    @Bean
    public AuthenticationPrincipalArgumentResolver authenticationPrincipalArgumentResolver(){
        return new AuthenticationPrincipalArgumentResolver();
    }

    @Override
    public void addArgumentResolvers(List argumentResolvers) {
        argumentResolvers.add(authenticationPrincipalArgumentResolver());
    }
}