README.md in bootic_client-0.0.20 vs README.md in bootic_client-0.0.21

@@ -26,14 +26,17 @@
 
 You first must create an OAuth2 Application in your Bootic dashboard. Then configure the client with your `client_id` and `client_secret`.
 
 ```ruby
 BooticClient.configure do |c|
+  # these are required for OAuth2 strategies
   c.client_id = ENV['BOOTIC_CLIENT_ID']
   c.client_secret = ENV['BOOTIC_CLIENT_SECRET']
+  # these are optional
   c.logger = Logger.new(STDOUT)
   c.logging = true
   c.cache_store = Rails.cache
+  c.user_agent = "My App v1"
 end
 ```
 
 ### Using with an existing access token