Adds deprecation notice to README

CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-...
+### Changed
+
+- Added deprecation notices to README and Gemspec
 
 ## [2.3.0] - 2021-01-07
 

README.md

@@ -1,3 +1,21 @@
+🚨🚨🚨
+
+**This library is no longer actively maintained.** The Authy API has been replaced with the [Twilio Verify API](https://www.twilio.com/docs/verify). Twilio will support the Authy API through November 1, 2022 for SMS/Voice. After this date, we’ll start to deprecate the service for SMS/Voice. Any requests sent to the API after May 1, 2023, will automatically receive an error.  Push and TOTP will continue to be supported through July 2023.
+
+[Learn more about migrating from Authy to Verify.](https://www.twilio.com/blog/migrate-authy-to-verify)
+
+Please visit the Twilio Docs for:
+* [Verify + Ruby (Rails) quickstart](https://www.twilio.com/docs/verify/quickstarts/ruby-rails)
+* [Twilio Ruby helper library](https://www.twilio.com/docs/libraries/ruby)
+* [Verify API reference](https://www.twilio.com/docs/verify/api)
+* **Coming soon**: Look out for a new Devise plugin to use Twilio Verify with Devise
+
+Please direct any questions to [Twilio Support](https://support.twilio.com/hc/en-us). Thank you!
+
+🚨🚨🚨
+
+---
+
 # Authy Devise [![Build Status](https://github.com/twilio/authy-devise/workflows/build/badge.svg)](https://github.com/twilio/authy-devise/actions)
 
 This is a [Devise](https://github.com/plataformatec/devise) extension to add [Two-Factor Authentication with Authy](https://www.twilio.com/docs/authy) to your Rails application.

devise-authy.gemspec

@@ -10,8 +10,8 @@ Gem::Specification.new do |spec|
   spec.authors       = ["Authy Inc."]
   spec.email         = ["[email protected]"]
 
-  spec.summary       = %q{Authy plugin for Devise.}
-  spec.description   = %q{Authy plugin to add two factor authentication to Devise.}
+  spec.summary       = %q{Deprecated: please see README for details}
+  spec.description   = %q{Authy plugin to add two factor authentication to Devise. This gem is deprecated, please see the README for details.}
   spec.homepage      = "https://github.com/twilio/authy-devise"
   spec.license       = "MIT"