Signing In
When any Package Manager repositories require authentication, a Sign In link appears in the navigation bar. Clicking the Sign In link opens a dialog box where you can enter your credentials.
Paste a token into the dialog box and click Sign In to authenticate.
Getting a Token
Access to authenticated repositories requires a token with the repos:read
scope for those repositories. Your Package Manager administrator can provide you with a token to use for authentication. See Creating API Tokens for details.