setSignInProvider

gistfile1.js

window.Ecwid.OnAPILoaded.add(function() {
  window.Ecwid.setSignInProvider({
    addSignInLinkToPB: function() { return true; },
    signIn: function () { alert('sign in');
      window.Ecwid.setSsoProfile('<?php echo "$message $hmac $timestamp"; ?>');
    },
    canSignOut: function() { return true; },
    signOut: function () { alert('sign out') }
  });
});