title: How to launch FCM ID Service only after a particular activity is triggered?
body: <p>Assume I have a <code>LoginActivity</code> where user can either register or login with existing credentials. I don't want <code>FirebaseInstanceIdService</code> to generate a token, unless user is logged in and <code>MainActivity</code> of the application is launched. </p>
  
  <p>Thank you </p>