post
https://kigo-core-server-stage.kigodigital.net/api/v1/accounts/log-in/sso/google
Verifies a Google OAuth access token, creates the account on first login or
signs in an existing one, and returns an AccountSpaceApiSession access +
refresh token pair. Mirrors the legacy POST /accounts/log-in/sso/google
behavior, differing only in the issued token type.