Ох как намаааялся я с тобой, моя попытка ноомер 4

spring_online_calculator/src/main/java/premium_store/configuration/SecurityConfiguration.java

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+package premium_store.configuration;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.web.SecurityFilterChain;
+
+@Configuration
+@EnableWebSecurity
+@EnableMethodSecurity(
+        securedEnabled = true
+)
+public class SecurityConfiguration {
+    private final Logger log = LoggerFactory.getLogger(SecurityConfiguration.class);
+    private static final String LOGIN_URL = "/login";
+    private final UserService userService;
+
+    public SecurityConfiguration(UserService userService) {
+        this.userService = userService;
+        createAdminOnStartup();
+    }
+
+    private void createAdminOnStartup() {
+        final String admin = "admin";
+        if (userService.findByLogin(admin) == null) {
+            log.info("Admin user successfully created");
+            userService.addUser(admin, "adminemail@gmail.com", admin, admin, UserRole.ADMIN);
+        }
+    }
+
+    @Bean
+    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
+        http.headers().frameOptions().sameOrigin().and()
+                .cors().and()
+                .csrf().disable()
+                .authorizeHttpRequests()
+                .requestMatchers(UserSignupMvcController.SIGNUP_URL).permitAll()
+                .requestMatchers(HttpMethod.GET, LOGIN_URL).permitAll()
+                .anyRequest().authenticated()
+                .and()
+                .formLogin()
+                .loginPage(LOGIN_URL).permitAll()
+                .and()
+                .logout().permitAll();
+        return http.build();
+    }
+
+    @Bean
+    public AuthenticationManager authenticationManagerBean(HttpSecurity http) throws Exception {
+        AuthenticationManagerBuilder authenticationManagerBuilder = http
+                .getSharedObject(AuthenticationManagerBuilder.class);
+        authenticationManagerBuilder.userDetailsService(userService);
+        return authenticationManagerBuilder.build();
+    }
+
+    @Bean
+    public WebSecurityCustomizer webSecurityCustomizer() {
+        return (web) -> web.ignoring()
+                .requestMatchers("/css/**")
+                .requestMatchers("/js/**")
+                .requestMatchers("/templates/**")
+                .requestMatchers("/webjars/**");
+    }
+}