'Analagous to `_login_admin()` except for a non-admin user.'

def _login_user(self, token=None):

    if (token is None):
        token = self.user.totp.now()
    resp = self.client.post(url_for('login'), data=dict(username=self.user.username, password=self.user_pw, token=token))
    return resp
