How to Call Function Deployed to App Platform

I was reading through this tutorial on managing functions with App Platform: https://docs.digitalocean.com/products/app-platform/how-to/manage-functions/.

It says this:

Opening the live URL of a function directly in your browser can result in errors if your function is expecting input parameters. Use API testing tools like Postman, curl, or your programming language’s HTTP client library to test the URL with properly formatted HTTP requests.

How do I make a properly formatted HTTP request? I don’t see anything that says how.

In Insomnia (similar to Postman), I tried the following for the url https://site.ondigitalocean.app/COMPONENT/PACKAGE/FUNCTION

1. A GET request to the function URL with a JSON body containing my serverless function arguments
2. A GET request to the function URL with query/search params containing my serverless function arguments
3. A POST request to the function URL with a JSON body containing my serverless function arguments

For all of these, I tried passing Basic MY_AUTH_TOKEN that I use for normal functions. Nothing I do works. I always get a 400 Bad Request with the following error:

{
  "code": "0570a2968654cb1831572b65bab68416",
  "error": "There was an error processing your request."
}

Just wondering what I’m doing wrong so I can get this working.

Thanks,

Joshua.