How to use the @salesforce/core.AuthInfoConfig.resolveRootFolder function in @salesforce/core

public async getAuthInfoObjects() {
    const authFilesArray = await AuthInfo.listAllAuthFiles().catch(err => null);

    if (authFilesArray === null || authFilesArray.length === 0) {
      return null;
    }
    const authInfoObjects: FileInfo[] = [];
    for (const username of authFilesArray) {
      try {
        const filePath = path.join(
          await AuthInfoConfig.resolveRootFolder(true),
          '.sfdx',
          username
        );
        const fileData = readFileSync(filePath, 'utf8');
        authInfoObjects.push(JSON.parse(fileData));
      } catch (e) {
        console.log(e);
      }
    }
    return authInfoObjects;
  }