Required input 'LoginEnterAlternateIdentifierSubtask' not provided
This morning I've encountered authentication failures with Task 3 in `get_session.py`. I added some prints:

```
Task 3 response: {'errors': [{'code': 366, 'message': "Required input 'LoginEnterAlternateIdentifierSubtask' not provided. g;<<some identifier that I don't know if sensitive"}]}
```

Any ideas?