title: Send the push notification FCM (Firebase cloud messagging) to the current user
body: <p>I have an android application with <code>kotlin</code> and I want to send notifications to only one user when Status data is change. 
  First, I try Topics with postman but that is not what am looking for !
  So, am looking for a solution that makes me send push notification to the only user who has status changes.</p>
  
  <p>Someone please tell me how to do that.</p>