Returns the stack instance that's associated with the specified stack set, AWS account, and Region.
For a list of stack instances that are associated with a specific stack set, use ListStackInstances.
cloudformation_describe_stack_instance(StackSetName,
StackInstanceAccount, StackInstanceRegion)
[required] The name or the unique stack ID of the stack set that you want to get stack instance information for.
[required] The ID of an AWS account that's associated with this stack instance.
[required] The name of a Region that's associated with this stack instance.
svc$describe_stack_instance( StackSetName = "string", StackInstanceAccount = "string", StackInstanceRegion = "string" )