How do I get the verification code from a verfied social login

We’re currently using passwordless login, where a user will receive a magic link containing their email and verification code. I would like to add a social login, where I can log them in after I get back their details from the social login. I have been able to get back an access token from a google login, as well as all the user details, but am stuck on how to get the verification token. Any help would be massively appreciated