Improved TLS configuration

[SvenKeimpema]

This update addresses an issue in previous versions of zitadel-rust where the crate was unable to connect to the server. The cause of this issue was that the previous versions of this crate was unable to find certificates which consistently results in the error message "could not set up TLS connection".

The reason of this error message is that there isn't always a certificate within the image thus resulting in this error.

To fix this issue I've added an option for the user that lets him choose between using tls-roots or using tls-webpki-roots

However, it's important to note that this change introduces a breaking change to the crate's configuration options.
Users are now required to choose between using tls-roots or tls-webpki-roots for TLS certificate configurations.

Whilst this change may be inconvenient, it is pretty usual within other crates choose between tls-webpki-roots and tls-roots.

Here's an example of how to use the new configuration:

zitadel = {features=["tls-roots"]}

or

zitadel = {features=["tls-webpki-roots"]}

[buehler]

Hi @SvenKeimpema

Thank you for contributing!

This does not have to be a breaking change. You could add the tls-webpki roots as optional feature and not enable it by default. And in the default features, you enable what already has been in place. As such, users who have the need can disable default features and use the specialized case, right?

Otherwise I'm fine with the change :)

[SvenKeimpema]

Hello @buehler

Thanks for the feedback! In the new commit should be an updated version of the cargo.toml where I put tls-roots as a default option in the features fields. This should fix the issue where it now won't be a breaking change.

PS:
For anyone reading this now if you wan't to use tls-webpki-roots instead of tis-roots u should add default-features = false into your cargo.toml file and enable the feature tls-webpki-roots

[buehler]

Hey @SvenKeimpema

I tried to merge, but I think clippy has something to rant about. Would you mind to fx the error and update the pr?

Thank you for the effort

[SvenKeimpema]

@buehler haha tried to access the feature I removed, ran clippy and seems to be working now.