api key should be a property of the api as a whole

[edeandrea]

You know what - I think you are 100% correct. The api key should be treated like the base url - a property of the api as a whole, not an individual request.

I'll fix this.

Thank you for catching it.

Originally posted by @edeandrea in #202 (comment)

[edeandrea]

This was completed in #208