launch
Information used to specify the launch template and version to use to launch instances. You can alternatively associate a launch template to the Auto Scaling group by specifying a `MixedInstancesPolicy`. For more information about creating launch templates, see Create a launch template for an Auto Scaling group in the Amazon EC2 Auto Scaling User Guide. If you omit this property, you must specify `MixedInstancesPolicy`, `LaunchConfigurationName`, or `InstanceId`.