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Git authentication not working when using RSA, but works if using ED25519

Is it still possible to use RSA keys for SSH authentication in bitbucket?

I've been using bitbucket since a while back and I have been using a Yubikey+GPG+gpgagent to authenticate against my bitbucket repositories. One day, it suddenly stopped working while still working on other git cloud repository providers. Public key was the same and I tested on different computers.

After some investigation I realized that the problem was not the Yubikey or the fact that I was using `gpgagent`.

* If I generate a ssh-key with `ssh-keygen -t rsa` and I add the public key to my SSH keys, I can't use it for authentication.
* If I generate a ssh-key with `ssh-keygen -t ed25519` then everything works fine.

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