Doesn't work on SSO login portal

Some portal that use SSO login do not use usernames and passwords, but use mobile phone code scanning to log in. For these websites, not passing in username and password parameters will result in failure to run.

No files or tests are named. Start by tracing the Python login flow and how username and password parameters are required; then investigate how SSO portals using mobile code scanning are represented. Done means the relevant SSO login path can run without username and password parameters, with coverage for the reported portal behavior.

Written by the indexing model from the issue text.