I am trying to hit register URL but I am getting 401 Unauthorized request

  @Bean
        SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http) throws Exception {
            http.authorizeHttpRequests((requests) ->
                    requests
                            .requestMatchers(HttpMethod.POST,"/register").permitAll()
                            .anyRequest().authenticated());
            http.sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS));
            http.exceptionHandling(exception -> exception.authenticationEntryPoint(unauthorizedHandler));
            http.csrf(csrf->csrf.disable());
            http.addFilterBefore(authTokenFilter(), UsernamePasswordAuthenticationFilter.class);
            return http.build();
        }