How to use the fabric-ca-client function in fabric-ca-client

console.error('File does not exist at path: ', ccpPath);
        console.error(
            'Please check the CONNECTION_PROFILE environemnt variable in your .env. The path will default to the root of the fabric-driver folder if not supplied',
        );
        return;
    }
    const ccp = JSON.parse(fs.readFileSync(ccpPath, 'utf8'));
    const config = getConfig();
    // Create a new CA client for interacting with the CA.
    const org = ccp.client["organization"];
    console.log('Org ', org);
    const caName =  ccp.organizations[org]["certificateAuthorities"][0];
    console.log('CA Name ', caName);
    const caURL = ccp.certificateAuthorities[config.caUrl ? config.caUrl : caName].url;
    console.log('CA URL', caURL);
    const ca = new FabricCAServices(caURL);
    const ident = ca.newIdentityService();

    const wallet = await Wallets.newFileSystemWallet(walletPath);
    const adminName = config.admin.name;
    const adminSecret = config.admin.secret;
    // build a user object for authenticating with the CA        // Check to see if we've already enrolled the admin user.
    let adminIdentity = await wallet.get(adminName);

    if (adminIdentity) {
        console.log('An identity for the admin user "admin" already exists in the wallet');
    } else {
        // Enroll the admin user, and import the new identity into the wallet.
        console.log('Enrolling Admin...', adminName, adminSecret);
        const enrollment = await ca.enroll({
            enrollmentID: adminName,
            enrollmentSecret: adminSecret,

async function getSubmitter(
  client, enrollmentID, enrollmentSecret, {
    url,
    mspId
  }) {

  try {
    let user = await client.getUserContext(enrollmentID, true);
    if (user && user.isEnrolled()) {
      return user;
    }

    // Need to enroll with CA server
    const ca = new CAClient(url, {
      verify: false
    });
    try {
      const enrollment = await ca.enroll({
        enrollmentID,
        enrollmentSecret
      });
      user = new User(enrollmentID, client);
      await user.setEnrollment(enrollment.key, enrollment.certificate, mspId);
      await client.setUserContext(user);
      return user;
    } catch (e) {
      throw new Error(
        `Failed to enroll and persist User. Error: ${e.message}`);
    }
  } catch (e) {