asynchronous/non-blocking Javascript

I am trying to make the existing code to async/non-blocking code. Can anyone help me with this? This is in route.js

async model(params) {
    let userCertificate = await Certificate.findByPublicId(this, params.certificate_public_id, { competencies: true }),
      product,
      competency,
      user = await User.find(this, userCertificate.user_id);

    if (userCertificate.granted_by_product_id) {
      product = await Product.find(this, userCertificate.granted_by_product_id);
    } else if (userCertificate.granted_by_competency_id) {
      competency = await Competency.find(this, userCertificate.granted_by_competency_id);
    }

    await userCertificate.fetchFileData(this);

    return { userCertificate, product, competency, user};
  }