How to enter through social.net?

Quickly log in to your personal account will help account in social or search networks. Authorization is available to VK, Facebook, Google and Yandex users.
Entry is done in three stages:
Click on the «Login» button at the top of the screen.
In the window that appears, select the authorization method.
Confirm your entry by clicking on the corresponding entry.

The use of accounts from the social.network excludes entering login and password.