o/exec  # reserved extension name for per cluster exec config\n      extension:\n        audience: 06e3fbd18de8  # arbitrary config\n\nIn some environments, the user config may be exactly the same across many clusters (i.e. call this exec plugin) minus some details that are specific to each cluster such as the audience.  This field allows the per cluster config to be directly specified with the cluster info.  Using this field to store secret data is not recommended as one of the prime benefits of...