PageController.adminLoginSSO

@GetMapping("/validate-ticket")
    public ModelAndView adminLoginSSO(
            @RequestParam(value = "ticket", required = false) String ticket,
            HttpServletRequest request
    ) {
        ServiceResponse serviceResponse = this.webClient.get().uri(
                String.format(
                        Setting.SERVER_VALIDATE_TICKET,
                        ticket,
                        Setting.CLIENT_LOGIN
                )
        ).retrieve().bodyToMono(ServiceResponse.class).block();
        System.out.println(String.format(
                Setting.SERVER_VALIDATE_TICKET,
                ticket,
                Setting.CLIENT_LOGIN
        ));
        Attributes attributes = serviceResponse.getAuthenticationSuccess().getAttributes();
        String username = serviceResponse.getAuthenticationSuccess().getUser();

        UserModel user = userService.getUserByUsername(username);

        if (user == null) {
            user = new UserModel();
            user.setEmail(username + "@ui.ac.id");
            user.setNama(attributes.getNama());
            user.setPassword("belajarbelajar");
            user.setUsername(username);
            user.setIsSso(true);
            user.setRole(roleService.getById(Long.valueOf(1)));
            userService.addUser(user);
        }

        Authentication authentication = new UsernamePasswordAuthenticationToken(username, "belajarbelajar");

        SecurityContext securityContext = SecurityContextHolder.getContext();
        securityContext.setAuthentication(authentication);

        HttpSession httpSession = request.getSession(true);
        httpSession.setAttribute(HttpSessionSecurityContextRepository.SPRING_SECURITY_CONTEXT_KEY, securityContext);

        return new ModelAndView("redirect:/");
    }