viral queue verify email and refer logic

logic.py

def verify_email(token):
    payload = utils.decode_jwt_token(token)
    user = get_user(payload['user_id'])
    if user is None:
        return

    if not user.email_confirmed:
        user.email_confirmed = True
        now = datetime.now(timezone.utc)
        user.email_confirmed_on = now
        user.save()

    if payload['referring_uuid'] is not None:
        refer(payload['referring_uuid'], user.waitlist.uuid)


def refer(referring_uuid, referred_uuid):
    referring_user = get_waitlist_user(referring_uuid)
    referred_user = get_waitlist_user(referred_uuid)
    try:
        referring_user.referred.append(referred_user)
        referring_user.score -= Waitlist.decrease_per_referral
        referring_user.save()
    except IntegrityError:
        pass