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From:   Erik Cervin Edin <erik@cervined.in>
Date:   Fri, 31 Dec 2021 14:04:03 +0100
Message-ID: <CA+JQ7M8U7Ocsk0JO=GmMyf5S6CnodTYjG=zAHGL4Bco8cfVBHw@mail.gmail.com>
Subject: Re: [Question] : git 2.33.1 asks every time password
To:     Jean-Louis FLOQUET <jese.jlf@gmail.com>
Cc:     "brian m. carlson" <sandals@crustytoothpaste.net>,
        git@vger.kernel.org
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> > > > I had to create a 'config' file within '.ssh' directory to support my
> > > > rsa key (too old format ?). Instructions according to
> > > > https://stackoverflow.com/questions/35233777/git-error-unable-to-negotiate-with-xx-xx-xxx-xxx-no-matching-host-key-type-fo

But perhaps I misunderstood.

If your question is why authentication is falling back to username/password
See my answer at SO
https://stackoverflow.com/a/70434510
for a similar issue with Git/AzureDevOps server.

TLDR:
Git for Windows 2.3something updated OpenSSH to 8.something
This changed default behavior of which SSH encryption algorithms
deemed cryptographically safe.
Not all services allow more sophisticated keys,
in which case you may override to OpenSSH defaults