{
                "prefix": "spiffe://cluster.local/"
               }
              ]
             },
             "validation_context_sds_secret_config": {
              "name": "ROOTCA",
              "sds_config": {
               "api_config_source": {
                "api_type": "GRPC",
                "grpc_services": [
                 {
                  "envoy_grpc": {