B0_github.AuthSourceAuthentication.
The type for GitHub authentication.
make ~http ~user () determines authentication via personal access token for user user. It the latter is unspecified it first looks up the contents of the B0_GITHUB_TOKEN environment variable if that fails it looks up for an existing token in the B0_std.Os.Dir.config () /b0/github/$USER.token file. If that fails instructions are printed on how to setup the token.
user_env is "B0_GITHUB_USER".
user_env is "B0_GITHUB_TOKEN".
cli () is a command line interface for GitHub authentication. opts are the options that can be used for specifiying the github user (defaults to ["u";"github"])