Propagate security context

I do have a SpringBoot service which supports Kerberos / SpNego authentication and inside this service I would like to execute some SVN operations but with the same user / security context.

Does anybody has a sample how could propagate security context to SVNKit operations?
I saw that implementing IHTTPNegotiateAuthenticationFactory but could not found any documentation.

https://issues.tmatesoft.com/issue/SVNKIT-40