Fix: Ensure autogenerate_code_verifier defaults to True in from_client_config

[kosperun]

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Fixes #354 🦕

[clundin25]

Not sure I am doing something wrong here, but I cannot leave a comment on this line. Maybe because your PR does not touch it?

Instead, I think we should change line 242 to:

if self.code_verifier is None and self.autogenerate_code_verifier:

My thoughts are:

1. We want to use PKCE as much as possible.
2. This keeps the logic near where the variables are used, so other refactors don't accidentally revert this behavior and new constructors don't have to repeat this check.

@Perun108 what are your thoughts?

[kosperun]

@clundin25 Thank you so much for the suggestions. They make total sense. I updated my PR accordingly, please review. Thanks!

[clundin25]

Thank you @Perun108 for your contribution! This looks great! Would you mind fixing the unit tests?

[kosperun]

@clundin25 Thank you, I'm so happy you found my little contribution valuable. Sure, I will try to fix the unit tests, but it will probably take me some time to figure out how the tests are set up and how the objects are mocked.

[kosperun]

@clundin25 Could you please take a look at my updated PR? I fixed failing tests. Thanks!