title: Send push notification to specific user?
body: <p>I'm making an app where I want to be able to set a basic notification (title, message, fire date) and have been trying to figure out the best way to setup the notifications. I'm working with Swift 3 and Firebase 3. </p>
  
  <p>I don't want to use local notifications because if the user is logged in on multiple devices I want it to push to all those devices. </p>
  
  <p>Is there a way to do this with FCM where a user can set a notification to fire at a specific date and time and have it fire on all (iOS) devices logged in? </p>
  
  <p>If FCM doesn't have this, is there another APK that does? I've looked at Batch briefly but I'm already using Firebase. </p>
  
  <p>Thanks in advance!</p>