cryptography
distro; sys_platform == 'linux'
filelock
google-api-python-client>=1.7.10
google-auth-httplib2
google-auth-oauthlib>=0.4.1
google-auth>=1.11.2
httplib2>=0.17.0
passlib>=1.7.2
python-dateutil
yubikey-manager>=4.0.0