Vkontakte Auth: Change users.get to secure.checkToken (#2880)
Vkontakte Auth: Change users.get to secure.checkToken (#2880)

* Change users.get to secure.checkToken

You can't get user info by client token due vk restrictions. You must check token via secure.checkToken.

* Configuration checks for vk auth.

* Move config check to promise, remove debug log, add message to logger on error.

rendongsc/parse-server,Isaack90/parse-server,rendongsc/parse-server,Isaack90/parse-server,rendongsc/parse-server,rendongsc/parse-server,Isaack90/parse-server,Isaack90/parse-server