minor fixes in usecase

Author: ami-aman

Apps/CocoaPods-FCM/src/AppDelegate.swift

@@ -33,7 +33,7 @@ class AppDelegate: NSObject, UIApplicationDelegate {
         // Now that the Firebase and Customer.io SDK's are initialized, follow the rest of the required steps for the FCM push setup.
         UNUserNotificationCenter.current().delegate = self
 
-        MessagingPushFCM.configure { config in
+        MessagingPushFCM.initialize { config in
             config.autoFetchDeviceToken = true
         }
 

Apps/CocoaPods-FCM/src/View/SettingsView.swift

@@ -156,7 +156,7 @@ struct SettingsView: View {
         init() {
             self.settingsManager = CioSettingsManager()
             self.keyValueStorage = KeyValueStore()
-            self.pushToken = CustomerIO.shared.registeredDeviceToken() ?? "(none)"
+            self.pushToken = CustomerIO.shared.registeredDeviceToken ?? "(none)"
             self.settings = settingsManager.appSetSettings ?? CioSettings.getFromCioSdk()
         }