Ensure there are no hard coded keys used in base64 encoded value of AWS Launch Configuration

Using base64 encoded private keys as part of config can provide access to unauthorized users provided config is exposed.

For more information on how to setup launch configurations, see the AWS documentation.

In Terraform -

1. In the aws_launch_configuration resource, remove any user_data_base64 data that might contain hardcoded keys.
2. This will destroy existing launch configurations for autoscaling groups and deploy a new configuration. For more information, see the Terraform documentation.

References:
https://docs.aws.amazon.com/autoscaling/ec2/userguide/create-asg-launch-configuration.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/launch_configuration