In what Javascript file "abp.services.app" is defined?

I am integrating my own template to ASP.NET Boilerplate and now I am getting JavaScript errors.

(function() {
    $(function() {
        var _userService = abp.services.app.user; <-- ERROR HERE
    })
});

In what Javascript file "abp.services.app" is defined? I must be missing to include one of the Javascript file.