`secrets` Map Key-value pairs that represent secret values from [AWS Systems Manager Parameter Store](https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html) or [AWS Secrets Manager](https://docs.aws.amazon.com/secretsmanager/latest/userguide/intro.html) that will be securely passed to your service as environment variables. secrets.`from_cfn` String The name of a [CloudFormation stack export](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-stack-exports.html).