"remote authentication required but no callback set" in pull after upgrading from 0.28 to 0.29

[FreeAndNil]

@bording we get the error "remote authentication required but no callback set" after upgrading from 0.28 to 0.29 when connecting to a company internal azure devops server.

This works great with the old version using windows authentication.

Reproduction steps

• connect to a company internal azure devops server via windows authentication

      Signature signature = GetSignature();
      PullOptions pullOptions = new()
      {
        MergeOptions = new() { FileConflictStrategy = CheckoutFileConflictStrategy.Theirs }
      };
      MergeResult mergeResult = Commands.Pull(Repository, signature, pullOptions);

Expected behavior

Success

Actual behavior

LibGit2Sharp.LibGit2SharpException
HResult=0x80131500
Message=remote authentication required but no callback set
Source=LibGit2Sharp
StackTrace:
at LibGit2Sharp.Core.Ensure.HandleError(Int32 result) in /_/LibGit2Sharp/Core/Ensure.cs:line 154

Version of LibGit2Sharp (release number or SHA1)

0.29

Operating system(s) tested; .NET runtime tested

Windows 11, .NET 4.8

Seems to be related to #2065 and #2087

[mezzo1981]

Hi, any update on this ? we have the same issue...

[FreeAndNil]

@bording is there any chance of fixing this?

[bording]

@bording is there any chance of fixing this?

To have any chance of it getting fixed, I would need a way to reproduce it. I can't connect to your company internal azure devops server via windows authentication, so that's rather tricky.

[FreeAndNil]

@bording I could try to reproduce it on a azure VM where I could grant you access.
Would this be an option for you?

[bording]

@bording I could try to reproduce it on a azure VM where I could grant you access. Would this be an option for you?

That would at least let me see the failure happening myself, but ideally there would be a way to run some reproduction code under a debugger to really see what was going on.

The best way forward here would be if a failing test could be added to the repo to demonstrate the problem, though I don't immediately know how that might be achieved since you're saying Windows auth is a requirement.