Differences between code and article in the Spring Security setup

[mxmlnglt]

I read https://www.baeldung.com/spring-security-oauth2-authentication-with-reddit in order to understand how to implement OAuth in a legacy Spring (no Boot, Spring Security 4.x) web application but seems like the code doesn't match the article.

esp.

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    /* ... */

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .anonymous().disable()
            .csrf().disable()
            .authorizeRequests()
            .antMatchers("/home.html").hasRole("USER")
            .and()
            .httpBasic()
            .authenticationEntryPoint(oauth2AuthenticationEntryPoint());
    }

    private LoginUrlAuthenticationEntryPoint oauth2AuthenticationEntryPoint() {
        return new LoginUrlAuthenticationEntryPoint("/login");
    }
}

which makes use of .authenticationEntryPoint() method + a LoginUrlAuthenticationEntryPoint object,

while https://github.com/Baeldung/reddit-app/blob/master/reddit-web/src/main/java/org/baeldung/config/web/GeneralSecurityConfig.java

@Configuration
@EnableWebSecurity
@ComponentScan({ "org.baeldung.security" })
public class GeneralSecurityConfig extends WebSecurityConfigurerAdapter {

    /* ... */

    @Override
    protected void configure(final HttpSecurity http) throws Exception {
        // @formatter:off
        http.anonymous().disable().csrf().disable().authorizeRequests()
            .antMatchers("/api/*","/feedForm","/profile","/scheduledPosts","/feeds","/changePassword","/updatePassword").authenticated()
            .antMatchers("/adminHome","/users").hasAuthority("USER_READ_PRIVILEGE")
        .and()
	    .formLogin().loginPage("/").loginProcessingUrl("/j_spring_security_check").defaultSuccessUrl("/home")
            .failureUrl("/?error").usernameParameter("username").passwordParameter("password")
            .successHandler(successHandler)
            .and()
            .logout().invalidateHttpSession(true).deleteCookies("JSESSIONID").logoutUrl("/logout").logoutSuccessUrl("/")
            .and()
            .sessionManagement().sessionFixation().none().maximumSessions(1).maxSessionsPreventsLogin(true);
        // @formatter:on
    }

}

calls .formLogin() loginPage() failureUrl() and so on...