Creating a post request for an article

Post-controller-article.js

exports.post = async function (req, res) {
  const authorId = await req.params.authorID;
  const postObject = await req.body;
  const newPost = new PostModel(postObject);

  await AuthorModel.findOne({ _id: authorId }, async (err, foundAuthor) => {
    if (!foundAuthor) {
      return err;
    }
    foundAuthor.posts.push(newPost);
    newPost.author = foundAuthor;
    await newPost.save((error, savedPost) => {
      if (error) {
        return error;
      }
      return res.json(savedPost);
    });
    await foundAuthor.save((error, savedAuthor) => {
      if (error) {
        return error;
      }
      return res.json(savedAuthor);
    });
    return foundAuthor;
  });
};