List cells for an account
The following is an example of a request to list the cells in an account, and the response.
aws route53-recovery-readiness --region us-west-2 list-cells
{ "Cells": [ { "CellArn": "arn:aws:route53-recovery-readiness::888888888888:cell/test-cell", "CellName": "test-cell", "Cells": [], "ParentReadinessScopes": [], "Tags": {} } ] }