Send a batch of messages to usersShow details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/pinpoint/send-users-messages.html
| aws pinpoint send-users-messages --application-id |
| MBL309_User Engagement, Messaging, and Analytics Using Amazon Pinpoin… : http://www.slideshare.net/AmazonWebServices/mbl309user-engagement-messaging-and-analytics-using-amazon-pinpoint-from-a-to-z |