return this._authService.user.pipe(
            take(1),
            map(user => {
                console.log(user);
                return !!user;
            }),
            map(authenticated => {
                console.log(`Authenticated: ${authenticated}`);
                // not authenticated
                if (!authenticated) {
                    // accessing sign in or sign up pages
                    if (['/login', '/register'].includes(url)) {
                        console.log('Allow through');
                        return true;
                    }
                    // accessing application
                    else {
                        console.log('Should bounce to login');
                        this._router.createUrlTree(['/login']);
                        return false;
                    }
                }
                // authenticated
                else {
                    // accessing sign in or sign up pages
                    if (['/login', '/register'].includes(url)) {
                        console.log('Should bounce to dashboard');
                        this._router.createUrlTree(['/dashboard']);
                        return false;
                    }
                    // accessing application
                    else {
                        console.log('Allow through');
                        return true;
                    }
                }
            })
        );