Unable to disable the default login page in Spring boot 2.7.9 (Spring security 5.7.7)

Question

pom.xml

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.9</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
    </dependencies>

MyReportsApplication.java

package com.karthik.reports;

@SpringBootApplication
public class MyReportsApplication {

    public static void main(String[] args) {
        System.out.println("IN MAIN CLASS");
        SpringApplication.run(MyReportsApplication.class, args);
    }
}

I have created a configuration class for custom security configuration as shown below

SecurityConfig.java

    package com.karthik.reports.config;
    
    @Configuration
@EnableWebSecurity
public class SecurityConfig {
    
    @Bean
    public InMemoryUserDetailsManager userDetailsManager() {
        UserDetails user  = User.withDefaultPasswordEncoder()
            .username("Karthik")
            .password("pass")
            .roles("ADMIN")
            .build();
        
        return new InMemoryUserDetailsManager(user);
    }

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        
        System.out.println("SECURITY FILTER CHAIN");
        
        return http
                .csrf(csrf-> csrf.disable())
                .authorizeRequests(auth -> {
                    auth.antMatchers("/country").permitAll();
                    auth.antMatchers("/state").hasRole("USER");
                    auth.antMatchers("/city/**").hasRole("ADMIN");
                })
                .httpBasic(Customizer.withDefaults())
                .build();
    }
}

When I hit my REST end point http://localhost:8090/myreports/country, I am getting a default login page. I have also enabled httpbasic authentication in the config class

Can you please advise on how to remove the default login page and why the default login form is coming for "/country" endpoint which need not be authenticated as per the config class.