Logout with Firebase - angularjs

Question

I am trying to do a user auth, and I am in the part of the logout now
<button ng-click="logOut(user)">
GOING OUT
</button>
here is how they sign in
$scope.signIn = function (user) {
$scope.signInErrorShow = false;
if (user && user.email && user.pwdForLogin) {
auth.$authWithPassword({
email: user.email,
password: user.pwdForLogin
}).then(function (authData) {
console.log("Logged in as:" + authData.password.email);
ref.child("users").child(authData.uid).once('value', function (snapshot) {
var val = snapshot.val();
$scope.$apply(function () {
$rootScope.displayName = val;
});
});
$scope.userLogin = true;
$ionicLoading.hide();
$scope.closeModal();
$rootScope.$broadcast('');
}).catch(function (error) {
$ionicLoading.hide();
});
} else
$scope.signInErrorShow = true;
};
and I am trying to call logOut
$scope.logOut = function(user) {
ref.unauth();
};
once I call log out, I don't see any post or get in the Network section of the browser.
In the Firebase Docs, all they say about log out is this
Logging Users Out
Calling unauth() invalidates the user's token and logs them out of your application:
Copy
ref.unauth();
If you had previously used the onAuth() method to listen for authentication state, your callback would now be invoked with null for authData.
so what should I do here ?

Answer 1

Concerning logout not showing any network activity: on login firebase probably gives you an access token (kept by the firebase client script) when you login.
When after login your application accesses firebase it adds this token to the header of your requests (authorization header?).
When you logoff the firebase client script simply erases the token. This way the firebase backend doesn't have to keep session state on their (distributed) servers. They only have to check the validity of the token sent in each request.