Add the ability to insert custom headers into the request

[unleash]

Add the ability to insert custom headers into the request

[thomasheartman]

Thanks for raising this! 😄 We don't currently support adding custom headers directly via the configuration option, but there is a workaround for it:

The config accepts a fetch property, where you can override window.fetch with your own implementation. You can use something like the js-fetch-defaults to have a fetch with the right headers pre-populated. Does that work for you? ☺️

And yeah, I know it's a bit more cumbersome than an additionalHeaders config property. I'll raise this internally and see what we can do 🙋🏼

Update: realized, after posting this message, that you've also opened a PR fixing this. Love it! ❤️