How to pass an authorization header to server sent events from angular JS

Please find below the angular code:-
var es = new EventSource('http://localhost:9080/stream',{withCredentials: true});
es.onmessage = function (event) {
let response=event.data;
response=JSON.parse(response);

that.timeout(function() {that.summary.data.summaryInformation = response.summaryInformation;});
console.log(event.data);
};


Server sent events code:-

@Controller
public class SSEController {

private static final Logger log = Logger.getLogger(SSEController.class);
private final AlertViewService alertViewService;

@Autowired
public SSEController(AlertViewService alertViewService) {
this.alertViewService = alertViewService;
}


@RequestMapping(path = "/stream", method = RequestMethod.GET)
public SseEmitter stream(@AuthenticationPrincipal UserService user) throws IOException {
SummaryView summaryView = alertViewService.summaryInformation();
SseEmitter emitter = new SseEmitter();
ScheduledExecutorService pingThread = Executors.newScheduledThreadPool(1);
emitter.onCompletion(() -> {
log.info("Complete");
pingThread.shutdown();
});
emitter.onTimeout(() -> {
log.info("Timeout");
});
pingThread.scheduleAtFixedRate(() -> {
try {
emitter.send(summaryView, MediaType.APPLICATION_JSON);
} catch (Exception e) {
log.error("Unable to emit", e);
}
} , 100000, 100000, TimeUnit.MILLISECONDS);
return emitter;



}
}