How to automatically generate access_token vk?

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Hello.
Tell me if there are solutions to the next task: there are n-pairs login: password in VK.
It is necessary that each account add the application to the allowed ones and receive an access_token. Doing this manually is unrealistic, and writing in PhantomJS is a bit lazy. Are there other solutions to this problem? Direct authorization is not suitable, because. hemorrhoids to obtain permission from the administration of the VC.
ps I'm not a spammer and I'm not doing anything forbidden, so all smart people who decide to read me morals, please pass by.