Authorization on the site using Grab Python?

Question

User identification

Good evening, I’m trying to log in to my circle, I can’t log in through moikrug.ru itself, so I have to use pda-passport.yandex.ru/passport?mode=mauth
, after that I go to moikrug.ru and request the contents of the page, this is what it displays:
window. location.replace("http\x3A\x2F\x2Fmoikrug\x2Eru\x2F\x3Fncrnd\x3D2221"); If you see this page, it means that your browser does not support automatic redirection. Click on this link to continue.
Can anyone suggest how to deal with this? Thanks in advance, I'm attaching the code

from grab import Grab
g = Grab(log_file='out.html')
g.go('http://pda-passport.yandex.ru/passport?mode=mauth')
g.set_input("login",  "login")
g.set_input("passwd", "***")
g.submit()
g.go("http://moikrug.ru/")
print (g.xpath_text('//*'))