Adds support for OpenAlex api_key request parameter

[phil-scholarcy]

OpenAlex provides an api_key query parameter that provides additional functionality and more frequent updates to commercial customers.

This PR adds api_key support to pyalex. Just set config.api_key to your API key value.

[J535D165]

Nice, thanks for the PR! I have seen mentions of this feature on the discussion board, however, this is the first time I see how this is implemented. Is there a reference to some documentation already (will merge it anyways).

[phil-scholarcy]

Nice, thanks for the PR! I have seen mentions of this feature on the discussion board, however, this is the first time I how this is implemented. Is there a reference to some documentation already (will merge it anyways).

Ah great, thanks! I don't think there's any public documentation on it yet. I just received an API key the other day with instructions for using it.

[J535D165]

Interestingly, the checks in your PR raise TOO_MANY_REQUESTS errors while the others don't. For example, the number of tests is not bigger than the number of tests in PR #9.

FAILED tests/test_pyalex.py::test_W4238809453_works_abstract - requests.exceptions.HTTPError: 429 Client Error: TOO MANY REQUESTS for url: https://api.openalex.org/works/W4238809453?api_key=my_api_key
FAILED tests/test_pyalex.py::test_random_works - requests.exceptions.HTTPError: 429 Client Error: TOO MANY REQUESTS for url: https://api.openalex.org/works/random?api_key=my_api_key

I wonder whether this is the result of adding the API key.

[J535D165]

Thanks!