Having trouble posting to Mongo DB after external API Call - node.js

Question

I'm attempting to make a fetch call to News API and populate my Articles collection in Mongo DB with the data I fetch. I have two files: articles.js, and article.js. - my schema looks like the following:
// Article.js
const ArticleSchema = new Schema({
title: {
type: String,
required: true
},
author: {
type: String,
required: true
},
description: {
type: String,
required: true
},
url: {
type: String,
required: true
},
datePublished: {
type: String,
required: true
},
source: {
type: String,
required: true
}
})
In articles.js, this is what my route looks like. My logic is that I make my fetch call, wait for the JSON to return, then iterate thru that json and map all the information I need to new story objects. Once I have those objects - I want to create a new instance of an Article for each, then post them to my Articles collection in Mongo DB.
/ #route POST /articles -> adds new instance of an article to the database
router.post('/', async (req, res) => {
try {
const res = await fetch('https://newsapi.org/v2/top-headlines?country=us&category=entertainment&apiKey=63c967f7cbd84c11b263b4e4758f1693');
const data = await res.json();
data.articles.forEach(article => {
const storyData = {
title: article.title,
author: article.author,
description: article.description,
url: article.url,
datePublished: article.publishedAt,
source: article.source.name
}
// console.log(storyData)
new Article(storyData)
.save()
})
} catch (err) {
console.error(err.message)
res.status(400).json({ message: err.message })
}
})
After my forEach loop, I get the objects like so:
{
title: `'Matrix 4' Style "Shifted" From Original Trilogy, Says Neil Patrick Harris - Hollywood Reporter`,
author: 'Ryan Parker',
description: 'The actor, who appears in the fourth installment, called the upcoming film "ambitious."',
url: 'https://www.hollywoodreporter.com/heat-vision/matrix-4-style-shifted-from-original-trilogy-says-neil-patrick-harris',
datePublished: '2020-09-16T17:54:26Z',
source: 'Hollywood Reporter'
}
I'm able to get the objects I'd like with the data I need, however when I attempt to call .save(), I receive validation error similar to the following:
"ValidationError: article validation failed: author: Path author is required."
I'm thinking that it may have to do with the fact that when I make post to the DB, the request should list something along the lines of "title: req.body.title", etc... Any thoughts on what could be causing this? My goal is to simply post these to the DB as I create them. Thanks!!!