code: func SubcommandContext(opts auth.Options, name string) *subcommands.Command {
  	return SubcommandContextWithParams(CommandParams{Name: name, AuthOptions: opts})
  }
docs: ////////////////////////////////////////////////////////////////////////////////
  // SubcommandContext returns subcommand.Command that can be used to setup new
  // LUCI authentication context for a process tree.
  //
  // This is an advanced command and shouldn't be usually embedded into binaries.
  // It is primarily used by 'luci-auth' program. It exists to simplify
  // development and debugging of programs that rely on LUCI authentication
  // context.