LibGit2Sharp.LibGit2SharpException: failed to parse supported auth schemes: The operation identifier is not valid

// code start
LibGit2Sharp.PullOptions options = new LibGit2Sharp.PullOptions();
options.FetchOptions = new FetchOptions();
options.FetchOptions.CredentialsProvider = new CredentialsHandler(
(url, usernameFromUrl, types) =>
new UsernamePasswordCredentials()
{
Username = _gitCredsUser,
Password = _gitCredsPassword
});

        // User information to create a merge commit
        var signature = new LibGit2Sharp.Signature(
            new Identity(_gitUsername, _gitEmail), DateTimeOffset.Now);

        // Pull
        Commands.Pull(repo, signature, options);

// end code

I am using LibGit2Sharp dll of 0.26.0.0, from last few days I am getting "failed to parse supported auth scheme" error while doing git pull. My git repository is on GITHUB. I am sure there might security related changes done on github side. that's why this error come.

Reproduction steps

Expected behavior

git pull should work without error.

Actual behavior

Version of LibGit2Sharp (release number or SHA1)

0.26.2

Operating system(s) tested; .NET runtime tested

windows 10

从 LibGit2Sharp 0.26.2 中展示的 Commands.Pull 调用及其 FetchOptions/CredentialsHandler 配置开始，然后在 Windows 10 上针对 GitHub 重现身份验证失败。比较其中涉及的受支持身份验证方案，并验证使用所报告凭据的 pull 能够在没有解析错误的情况下完成。