removed the li which contained the birthdate as '06.06.1992' string and inserted the age in years beside the name.
UserService.getUser(_Id) now returns a Date Object instead of an isoString, because 'input type="date"' can handle these date objects and we removed the li which provided the birthdate string
$rootScope.$on('userUpdate') just fetches the new age from this.user.birthdate and does not request the user again