authetication web services spring mvc

I need call a web services in an url and later modify json that I recieve, but I don't obtain the result correct. I use spring mvc.

I have this code java in the service web:

  @RequestMapping("/test")
  @ResponseBody
  public String infoSist() throws Exception {
    base = new URL("http://localhost:" + port + "/metrics");
    template = new RestTemplate();
    System.out.println(base);
    ResponseEntity<String> infoSist = template.getForEntity(base.toString(), String.class);
    System.out.printf("Exit: \n\n  %s",infoSist.getBody()); 
    return infoSist.getBody();  
  }

I don't show the json of request this URL, I obtained the html of login page. I supose that it is the problem with authetication, but I don´t know how solution this problem. I have to change the login user to database in the future ....

This is my config security:

protected void configure(HttpSecurity http) throws Exception {
    http
        .authorizeRequests()
            .antMatchers("/css/**", "/js/**", "/images/**", "/data/**", "/", "/home").permitAll()
            .anyRequest().authenticated()
            .and()
        .formLogin()
            .loginPage("/login")
            .permitAll()
            .and()
        .logout()
            .permitAll();
}

@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
    auth
        .inMemoryAuthentication()
            .withUser("user").password("password").roles("USER");

How i do the change for the call this url have permissions?

thank you very much!