Starts the user import.Show details from next link. https://docs.aws.amazon.com/ja_jp/cli/latest/reference/cognito-idp/start-user-import-job.html
aws cognito-idp start-user-import-job --user-pool-id "USER_POOL_ID" --job-id "JOB_ID" |
| Importing Users into User Pools From a CSV File - Amazon Cognito : http://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-creating-import-job.html |