offAuthStateChanged is now internal only - onAuthStateChanged now returns the unsubribe fn - as per web api

Author: Salakar

lib/modules/auth.js

@@ -61,13 +61,14 @@ export default class Auth extends Base {
     this.log.info('Creating onAuthStateChanged listener');
     this.on('onAuthStateChanged', listener);
     if (this._authResult) listener(this._authResult.user || null);
+    return this._offAuthStateChanged.bind(this, listener);
   }
 
   /**
    * Remove auth change listener
    * @param listener
    */
-  offAuthStateChanged(listener: Function) {
+  _offAuthStateChanged(listener: Function) {
     this.log.info('Removing onAuthStateChanged listener');
     this.removeListener('onAuthStateChanged', listener);
   }