private CorsConfiguration buildConfig(){
            CorsConfiguration config = new CorsConfiguration();
            config.addAllowedOrigin("*");
            config.addAllowedHeader("*");
            config.addAllowedMethod(HttpMethod.GET);
            config.addAllowedMethod(HttpMethod.POST);
            config.addAllowedMethod(HttpMethod.PUT);
            config.addAllowedMethod(HttpMethod.DELETE);
            config.addAllowedMethod(HttpMethod.OPTIONS);
            return config;
        }
        
        @Bean
        public CorsFilter corsFilter(){
            UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
            configSource.registerCorsConfiguration("/**", buildConfig());
            return new CorsFilter(configSource);
        }