Exception on authorization with duo hardware token

[yermalov-here]

When trying to generate keys using Duo Universal login having a hardware token as the only device registered gimme-aws-creds throws and exception when parsing the login form data.

This happens as the login-form doesn't contain a "preferred_device" input.

Expected Behavior

Current Behavior

The following exception is thrown

  File "***/python3.10/site-packages/gimme_aws_creds/duo_universal.py", line 172, in _get_duo_universal_login_form_data
    preferred_device = self._find_device_to_use(doc)
  File "***/python3.10/site-packages/gimme_aws_creds/duo_universal.py", line 185, in _find_device_to_use
    device = doc.find('.//input[@name="preferred_device"]').get('value')
AttributeError: 'NoneType' object has no attribute 'get' 

This happens as the login-form doesn't contain a "preferred_device" input.

Possible Solution

Steps to Reproduce (for bugs)

Context

Your Environment

• App Version used: 2.8.1
• Environment name and version: python3.10
• Operating System and version: Ubuntu 22.04