How must I do Auth?

[bvn13]

You've written:

// initialization and authorisation (VK.init , VK.Auth.login)

How must I import VK?

[ZigGreen]

It's up to you.
In the example: ApiQueue requires function for api calls as third parameter.
It's doesn't care about what implementation you've passed as long as it correspond to standard vkapi function signature (i.e. function api(methodName, params, callback)).
In other words, in client you easily go through authorization process as described in docs and when you've succeeded you pass VK.Api.call to ApiQueue as function for api calls.