function login() {
var provider = new firebase.auth.GoogleAuthProvider();
firebase.auth().signInWithPopup(provider).then(function (result) {
    window.user = result.user;
    adminCheck();
}).catch(function (error) {
    console.log(error.code, error.message);
}); }

firebase.auth().onAuthStateChanged(function (user) {
    if (user) {
        window.user = user;
        reinitialized = true;
        refreshNotifications();
    } else {
        askForLogin();
    }
});