See https://github.com/MicrosoftDocs/semantic-kernel-docs/blob/main/agent-framework/tutorials/quick-start.md#optional-installing-nightly-packages
I'm pretty sure that step to authorize access to "Microsoft" organization only works for organization members. What's the story for public nightly builds?
Also, why is "using nightly builds" part of the "quickstart". I don't think most folks will want to do this.