add email re and hd re

[johnowhitaker]

Additional params for solveit auth

[johnowhitaker]

Testing with this and https://github.com/AnswerDotAI/solve-lp/pull/277, it lets me log in with my aai email and not my gmail.

@rt
def index(): return Titled('Auth Test', A('Sign In with Google', href=solve_signin_rt, cls='button'))

@rt
def signin_completed(session, signin_reply: str=''):
    try:
        session['auth'] = sub_from_signin(session, signin_reply)
        return Titled('Signed In!', Pre('Sub ID: ' + session['auth']))
    except Exception as e:
        return Titled('Sign In Error', Pre(str(e)))