How to read value of a signal boolean in Angular17

I have a singal in service:

export class AuthService {
  constructor(private cookieService: CookieService) {}
  url = 'http://localhost:8000/api/v1/login';
  token: string = '';
  isAuthenticated = signal<Boolean>(false);
  changeIsAAuthenticated() {
    this.isAuthenticated.set(false);
    console.log(this.isAuthenticated);
  }
  getIsAAuthenticated() {
    return this.isAuthenticated;
  }

and in route guard i want to get its value:

 let authService = inject(AuthService);
 console.log(authService.isAuthenticated);

and i get:

function getter()

How to read a value of a singal?
I tried:
getValue, value, get or writing a getter but it didnt work.

console.log(authService.isAuthenticated);
  console.log(authService.getIsAAuthenticated());

return function getter()

I should have see the value just by console.log it, but it doesnt work.