`_set_api_key_parameter()` doesn't work

[ofer-pd]

The README demonstrates calling _set_api_key_parameter() with an API key, but if you follow the path of execution through the code, you'll see that argument never gets saved and used.

Furthermore, if you add a print statement to _query_cryptocompare() to dump the URL before issuing a request, you can see the param isn't being added.

I'd be happy to fix it if this project is still active enough to accept and merge PRs.

[lagerfeuer]

First off, sorry for the late response.

Yeah, the README is wrong. The project isn't actively maintained anymore, but feel free to throw up a PR that either removes this from the README or fixes it.

It should still work if you set the environment variable CRYPTOCOMPARE_API_KEY, however.