title: Step using Firebase Cloud Messaging Plugin in ionic framework
body: <p>I want to get a notification for my ionic application (android &amp; ios).I want to use Firebase Cloud Messaging. Did I need to install only Cordova-FCM-plugin or I need to install another plugin too like Cordova-firebase-plugin and PhoneGap-plugin-push. How about firebase firestore-plugin? did I need to install it too?</p>
  
  <p>I already build apps and install Cordova-FCM-plugin then run the apps but can't get the firebase token. Get this error:</p>
  
  <blockquote>
    <p>Error: exec proxy not found for :: FCMPlugin :: registerNotification</p>
  </blockquote>