OPENAI_API_KEY env var not recognized


```
$ autocog
OpenAI API key was not specified. Either set the OPENAI_API_KEY environment variable or pass it to autocog with the -k/--openai-api-key parameter.

$ echo $OPENAI_API_KEY
sk-xxxxxxxxxxxxxxxxxxx

$ autocog --openai-api-key=sk-xxxxxxxxxxxxxxxxxxx
Ordering files based on importance...
```