Widget:RegistrationButton

   <script src="https://idm.safetyid.eu/auth/js/keycloak.js"></script>
   <script>
       function initKeycloak() {
           var keycloak = new Keycloak();
           keycloak.init().then(function(authenticated) {
               alert(authenticated ? 'authenticated' : 'not authenticated');
           }).catch(function() {
               alert('failed to initialize');
           });
       }
   </script>

<script type="text/javascript">

 initKeycloak()

</script>