title: 3rd Party API call in MEAN
body: <p>I am learning MEAN stack and doing a POC to connect Firebase Cloud Messaging (FCM) with MEAN. To connect FCM (or any other 3rd party API) to MEAN, can we connect to Angular directly or do we have to connect through Express. Which is the best practice to follow.</p>
  
  <p>Thanks in Advance.</p>