From 14aad249b2da46a59911a0d664d414b4865b5aee Mon Sep 17 00:00:00 2001
From: Chris Oliver <excid3@gmail.com>
Date: Mon, 24 Jun 2024 08:54:26 -0500
Subject: [PATCH] Update FCM docs

Closes #456
---
 docs/delivery_methods/fcm.md | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/docs/delivery_methods/fcm.md b/docs/delivery_methods/fcm.md
index c672334..e2bb6fa 100644
--- a/docs/delivery_methods/fcm.md
+++ b/docs/delivery_methods/fcm.md
@@ -131,14 +131,8 @@ Firebase Cloud Messaging Notifications may fail delivery if the user has removed
 
 ```ruby
 class CommentNotification
-  deliver_by :fcm
-
-  # Remove invalid device tokens
-  #
-  # token - the device token from iOS or FCM
-  # platform - "iOS" or "fcm"
-  def cleanup_device_token(token:, platform:)
-    NotificationToken.where(token: token, platform: platform).destroy_all
+  deliver_by :fcm do |config|
+    config.invalid_token = ->(device_token) { device_token.destroy }
   end
 end
 ```