Is your feature request related to a problem? Please describe.

The error that occurs when making an axios request with a url that is undefined is unclear. This is problematic because I often write code that programmatically generates the url for the request, or uses the response from a previous request to compose the next request.

Describe the solution you'd like

If a url is falsey in the request config, throw a very clear error that indicates that no url was provided

Describe alternatives you've considered

Making sure I write better code that doesn't generate undefined urls

Additional context

This is the error generated currently Uncaught (in promise) TypeError: can't access property "protocol", n is undefined, which is not the most helpful in terms of pinpointing the issue.