@Autowiring give compilation error

I am trying to implement Spring security.I have created following test class for that

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.*;
import org.springframework.security.config.annotation.authentication.builders.*;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.*;

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

 @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth
                .inMemoryAuthentication()
                .withUser("user").password("password").roles("USER");
    }
    protected void configure(HttpSecurity http) throws Exception {
        http
             .authorizeRequests()
                .anyRequest().authenticated() ;

            http.formLogin().loginPage("/auth/login").permitAll();
    }

Following peace of code gives me compilation error.

@Autowired public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {

It Says Could not Autowire .No Bean of AuthenticationManagerBuilder Found .

I have followed http://ift.tt/1xK8KP3 tutorial. Please pin Point where i am wrong .