This content is part of a third party extension that is not supported by the Cake project. For more information about this extension see Cake.Npm.

public static void NpmPublish(this ICakeContext context, NpmPublishSettings settings)

var settings = 
        new NpmPublishSettings 
        {
            LogLevel = NpmLogLevel.Verbose,
            Source = "c:\mypackagesource"
        };
    NpmPublish(settings);