How to get user id from human submitted form?

Question

Django

There is a form in which a logged in user adds an account from VK(login)
How to connect user id and this login in the database? User model did not change.

Answer 1

#models.py
...
vk_login = ...
...

#views.py
user = request.user
user.vk_login = request.POST['login']
user.save()