Access Denied error could have better error message

[stephennancekivell]

Hi I get this error when we dont have the password configured for my companies nexus server. Then sbt keeps retrying. Adding the password resolves the problem.

[error] Server access Error: Too many follow-up requests: 21 url=https://nexus.mycompany.com/nexus/content/groups/public/org/slf4j/slf4j-parent/1.7.23/slf4j-parent-1.7.23.jar

If I curl the server It defiantly returns a HTTP/1.1 401 Unauthorized.

I think retrying makes sense for other http errors but not the 401. In this case it would be better if the error clearly said access denied and maybe prompted the user to configure a password. This would help other users debug their problems.

I think the error comes from here, and we could add another case. https://github.com/sbt/librarymanagement/blob/1.x/ivy/src/main/scala/sbt/internal/librarymanagement/ivyint/GigahorseUrlHandler.scala#L65

PS. I'd be interested in contributing to this, but was unable to import project into intellij. I get unresolved dependency: com.thoughtworks.paranamer#paranamer;2.8