GoogleCredentials has an inappropriate relationship with its subclasses

[nathanielmanistaatgoogle]

GoogleCredentials contains references to its subclasses; these references should be eliminated.

Why does anyone ever think implementation inheritance is a good idea?

[dhermes]

👍

[dhermes]

Original support added in #12 if it helps

[theacodes]

Thank you for creating this issue, however, this project is deprecatedand we will only be addressing critical security issues. You can read moreabout this deprecation here.

If you need support or help using this library, we recommend that you ask yourquestion on StackOverflow.

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