What to use for the place of the password in vk api?

Question

Android

Hello, it is necessary that the user can log in to the server using the vk api through a browser or android application. Authorization in VK is obtained, but I can’t figure out what data to use to register a user on my site.

Answer 1

email is not always available, link the account to the id of the VK page. And offer to enter an email.