Migration of Merge Graphql Schemas

Question

How do I join all the SCHEMAS that have been created.

import { mergeTypeDefs } from '@graphql-tools/merge';
import { loadFilesSync } from '@graphql-tools/load-files';
import path from 'path';

const typesArray = loadFilesSync(
  path.join(__dirname, 'modules', '**', 'infra', 'graphql', '*.gql'),
  { extensions: ['graphql'] },
);

const MergeTypes = mergeTypeDefs(typesArray);

console.log(MergeTypes);

export default MergeTypes;

{ Kind: 'Document', Definitions: [] }

Error: Query root type must be provided.

I was supposed to log all unified schemas not?

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I’ve been in the doc, but I didn’t understand anything: https://www.graphql-tools.com/docs/migration/migration-from-merge-graphql-schemas