title: Spring Boot Mixpanel : How to set properties to User profile?
body: <p>Now I am writing a application to send event to Mixpanel using Spring Boot and I currently can only set properties to event but not User profile.</p>
  
  <pre><code>        MessageBuilder messages = new MessageBuilder("my token");
          JSONObject eventProp = new JSONObject();
          eventProp.put("City", "Phnom Penh");
          JSONObject event = messages.event("joe@gribbl.com", "Logged In", eventProp);
  
          ClientDelivery delivery = new ClientDelivery();
          delivery.addMessage(event);
  
          MixpanelAPI mixpanel = new MixpanelAPI();
          mixpanel.deliver(delivery);
  </code></pre>
  
  <p>How to set properties to that user profile ?</p>