code: public static BigtableDataClient create(String projectId, String instanceId) throws IOException {
      BigtableDataSettings settings =
          BigtableDataSettings.newBuilder().setProjectId(projectId).setInstanceId(instanceId).build();
      return create(settings);
    }
docs: Constructs an instance of BigtableDataClient with default settings.
  
  @param projectId The project id of the instance to connect to.
  @param instanceId The id of the instance to connect to.
  @return A new client.
  @throws IOException If any.