Imports
- github.com/aws/aws-sdk-go/aws
- github.com/aws/aws-sdk-go/aws/credentials
- github.com/aws/aws-sdk-go/aws/session
- github.com/aws/aws-sdk-go/service/cloudwatch
- github.com/aws/aws-sdk-go/service/cloudwatch/cloudwatchiface
- github.com/mackerelio/go-mackerel-plugin-helper
- golang.org/x/sync/errgroup