Authentication fails for newer versions of urllib3
Login to Google Play returns a 403 Bad Authentication with recent versions of urllib3 which is used by the python requests package.
The issue is already known and discussed:
* https://github.com/simon-weber/gpsoauth/pull/25
* https://github.com/urllib3/urllib3/issues/2101
An easy-to-implement workaround is also available there, might be of interest to you.
Cheers :)
issue