Update api_config.py

[wouldayajustlookatit]

added the ability to pull the api key from a variable instead of the having to conduct a retrieve operation from a file. just another useful option :)

[couture-ql]

What's the use-case you'd like to solve for adding another keyword arg? There are three ways one can update the API Key, two of which avoid defining it in source code.

• Setting it directly by updating the global-state class attributes in ApiConfig.api_key = 'xxx'. This is not recommended as many people commit API Keys and this is generally a bad idea.
• Setting an API Key via env variable
• Setting an API Key via a file; this one branches to be slightly more complicated as we also allow callers to define where this file lives, other than a defined default.

I'd prefer to avoid adding another means to set an API Key, especially one that doesn't guide you away from hard-coding the API Key in source.

[couture-ql]

Closing due to lack of feedback.

Happy to revisit and address any particular use-case you're looking to solve.