var _registerExternal = function (registerExternalData) {

        var deferred = $q.defer();

        FB.api('/me', { fields: 'first_name,last_name,email' }, function (resp) {
            var data = {
                provider: 'Facebook',
                externalAccessToken: registerExternalData.externalAccessToken,
		        email: resp.email,
		        firstName: resp.first_name,
		        lastName: resp.last_name
            };
            $http.post(serviceBase + 'auth/register/external', data).success(function (response) {

                localStorageService.set('authorizationData', { token: response.access_token, userName: response.userName, userId: response.user_id, roles: response.roles + ',User', refreshToken: "", useRefreshTokens: false });

                _authentication.isAuth = true;
                _authentication.userName = response.userName;
                _authentication.userId = response.user_id;
                _authentication.roles = response.roles + ',User';
                _authentication.useRefreshTokens = true;

                deferred.resolve(response);

            }).error(function (err, status) {
                _logOut();
                deferred.reject(err);
            });
        });

        return deferred.promise;
    };

//i po-nadolu e tova:


FB.Event.subscribe('auth.authResponseChange', function (res) {
        if (res.status === 'connected') {
            /*
             The user is already logged,
             is possible retrieve his personal info
            */
            _obtainAccessToken({ provider: 'Facebook', externalAccessToken: res.authResponse.accessToken });

            /*
             This is also the point where you should create a
             session for the current user.
             For this purpose you can use the data inside the
             res.authResponse object.
            */
        }
        else {
            /*
             The user is not logged to the app, or into Facebook:
             destroy the session on the server.
            */
        }
    });

    FB.Event.subscribe('auth.statusChange', function (res) {
        console.log("respn");
    });