// allow auto join to cluster configuration
ClusterId clusterId = ClusterId.from("clusterId");
UserConfig userConfig = new UserConfig(Scope.cluster(clusterId));
userConfig.setSimpleField(KEY1, VALUE1);
ClusterConfiguration clusterConfiguration = new ClusterConfiguration(clusterId);
clusterConfiguration.addNamespacedConfig(userConfig);
clusterConfiguration.getRecord().setSimpleField(KEY2, VALUE2);
clusterConfiguration.setAutoJoinAllowed(true);
// there should be key1 and key2, but not auto join
UserConfig result = clusterConfiguration.getUserConfig();