How to use the tokendito.duo_helpers.authenticate_duo function in tokendito

mfa_challenge_url = selected_mfa_option['_links']['verify']['href']

    payload = helpers.prepare_payload(stateToken=primary_auth['stateToken'],
                                      factorType=selected_mfa_option['factorType'],
                                      provider=selected_mfa_option['provider'],
                                      profile=selected_mfa_option['profile'])
    selected_factor = okta_verify_api_method(
        mfa_challenge_url, payload, headers)

    mfa_provider = selected_factor["_embedded"]["factor"]["provider"].lower()
    logging.debug("MFA Challenge URL: [{}] headers: {}".format(
        mfa_challenge_url, headers))

    if mfa_provider == "duo":
        payload, headers, callback_url = duo_helpers.authenticate_duo(
            selected_factor)
        okta_verify_api_method(callback_url, payload)
        payload.pop("id", "sig_response")
        mfa_verify = okta_verify_api_method(
            mfa_challenge_url, payload, headers)
    elif mfa_provider == "okta" or mfa_provider == "google":
        mfa_verify = user_mfa_options(selected_mfa_option,
                                      headers, mfa_challenge_url, payload, primary_auth)
    else:
        logging.error("Sorry, the MFA provider '{}' is not yet supported."
                      " Please retry with another option.".format(mfa_provider))
        exit(1)
    return mfa_verify['sessionToken']