add description about credentials
@@ -49,5 +49,7 @@ command = ["check-aws-sqs-queue-size", "--access-key-id", "<aws-access-key-id>",
-c, --critical= critical if the number of queues is over (default: 100)
```
+The plugin uses the instance profile if possible, or you can configure `AWS_PROFILE` or `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` environment variables in the `env` settings.
+
## For more information
Please execute `check-aws-sqs-queue-size -h` and you can get command line options.
