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@Bean
    SecurityFilterChain filterChain(HttpSecurity http, AuthenticationManager authManager) throws Exception {
        
        JWTAuthenticationFilter jwtAuthenticationFilter = new JWTAuthenticationFilter();
        jwtAuthenticationFilter.setAuthenticationManager(authManager);
        jwtAuthenticationFilter.setFilterProcessesUrl("/login");
        
        return http
                .csrf().disable()
                .authorizeRequests()
                    .antMatchers("/register").permitAll()//cualquiera puede ingresar a /register
                    .antMatchers("/swagger-ui/**").permitAll()
                    .anyRequest().authenticated()
                .and()
                .sessionManagement()
                    .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                    .and()
                .addFilter(jwtAuthenticationFilter)
                .addFilterBefore(jwtAuthorizationFilter, UsernamePasswordAuthenticationFilter.class)
                .build();
    }