},
		config.HelpKV{
			Key:         RoleID,
			Description: "unique ID to generate the ARN" + defaultHelpPostfix(RoleID),
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         config.Comment,
			Description: config.DefaultComment,
			Optional:    true,
			Type:        "sentence",
		},
	}
)

// Allows only Base64 URL encoding characters.

	EnvKESClientKey        = "MINIO_KMS_KES_KEY_FILE"       // Path to TLS private key for authenticating to KES with mTLS - usually prefer API keys
	EnvKESClientPassword   = "MINIO_KMS_KES_KEY_PASSWORD"   // Optional password to decrypt an encrypt TLS private key
	EnvKESClientCert       = "MINIO_KMS_KES_CERT_FILE"      // Path to TLS certificate for authenticating to KES with mTLS - usually prefer API keys

			// then it is implicit on for the sub-system.
			enabled = true
		}
		v, _ := currKVS.Lookup(hkv.Key)
		if v == "" && !hkv.Optional && enabled {
			// Return error only if the
			// key is enabled, for state=off
			// let it be empty.
			return false, Errorf(
				"'%s' is not optional for '%s' sub-system, please check '%s' documentation",
				hkv.Key, subSys, subSys)
		}
	}
	c[subSys][tgt] = currKVS