updated as per @anabenites suggestions

Author: deshartman

rest/access-tokens/sync-example/sync-example.5.x.rb

@@ -5,18 +5,17 @@
 account_sid = ENV['TWILIO_ACCOUNT_SID']
 api_key = ENV['TWILIO_API_KEY']
 api_secret = ENV['TWILIO_API_KEY_SECRET']
-twilioSyncService = ENV['TWILIO_SYNC_SERVICE_SID']
+twilio_sync_service = ENV['TWILIO_SYNC_SERVICE_SID']
 
 
 # Required for Sync
-outgoing_application_sid = 'APxxxxxxxxxxxx'
 identity = 'user'
 
 # Create Sync grant for our token
 grant = Twilio::JWT::AccessToken::SyncGrant.new
 
 # Create a "grant" which enables a client to use Sync as a given user
-grant.serviceSid = twilioSyncService
+grant.service_sid = twilio_sync_service
 
 # Create an Access Token
 token = Twilio::JWT::AccessToken.new(

rest/access-tokens/sync-example/sync-example.6.x.py

@@ -7,7 +7,7 @@
 account_sid = os.environ['TWILIO_ACCOUNT_SID']
 api_key = os.environ['TWILIO_API_KEY']
 api_secret = os.environ['TWILIO_API_KEY_SECRET']
-twilioSyncService = os.environ[process.env.['TWILIO_SYNC_SERVICE_SID']
+twilio_sync_service = os.environ[process.env.['TWILIO_SYNC_SERVICE_SID']
 
 # required for Sync grant
 identity = 'user'
@@ -18,7 +18,7 @@
 # Create a Sync grant and add to token
 sync_grant = SyncGrant(
     # Create a "grant" which enables a client to use Sync as a given user
-    serviceSid=twilioSyncService
+    serviceSid=twilio_sync_service
 )
 
 token.add_grant(sync_grant)