<script>

            let user_logged = {};

            function onSuccess(googleUser) {
              console.log('Logged in as: ' + googleUser.getBasicProfile().getName());
            }
            function onFailure(error) {
              console.log(error);
            }

            function signOut() {
                if(auth2.signOut){
                    auth2.signOut();
                }
                if(auth2.disconnect){
                    auth2.disconnect();
                }
            }

            function userChanged(user){

                user_logged = user;

                // ak je prihlaseny user
                if(auth2.isSignedIn.get()){
                    $('.loggin_header').text(`Aktuálne je prihlásený používateľ : ${auth2.currentUser.get().getBasicProfile().getName()}`);
                    // auth2.isSignedIn.get()
                    $("#my-signin2").hide();
                    $(".logout_button").show();
                    $(".login_button").hide();
                    $(".user_info").text(auth2.currentUser.get().getBasicProfile().getName());
                } else {
                    $('.loggin_header').text("Prosím prihláste sa!");
                    $("#my-signin2").show();
                    $(".logout_button").hide();
                    $(".login_button").show();
                    $(".user_info").text("");
                }


            }

            let auth2 = {};

            function renderButton() {
                gapi.load('auth2', function() {
                    gapi.signin2.render('my-signin2', {
                        'scope': 'profile email',
                        'width': 240,
                        'height': 50,
                        'longtitle': true,
                        'theme': 'dark',
                        'onsuccess': onSuccess,
                        'onfailure': onFailure
                    });
                    gapi.auth2.init().then( //zavolat po inicializácii OAuth 2.0  (called after OAuth 2.0 initialisation)
                        function (){
                        auth2 = gapi.auth2.getAuthInstance();
                        auth2.currentUser.listen(userChanged);
                        auth2.isSignedIn.listen(userChanged);
                        auth2.then(userChanged); //tiez po inicializacii (later after initialisation)
                    });
                });
            }

            let logout = () => {



            };
          </script>

          <script src="https://apis.google.com/js/platform.js?onload=renderButton" async defer></script>