[BUG] Cannot add authenticator to account

[Xader726]

Description
When trying to add an authenticator to steamctl, it throws an error instead of being able to progress past logging in. Tried a different install of Python, tried WSL, nothing seems to work.

Steps to Reproduce the behavior
Try to add an authenticator to an account. Assuming its not just me (which is entirely possible), it should give an error saying "KeyError: 'oauth'"

Expected behavior
I expected to be able to log in and add an authenticator to both steamctl and the Steam mobile app. (Like seen here)

What actually happend
I wasn't able to get past logging in, since it just errors out.

Logs

steamctl -l debug

(Include logs related ot the issue. Use `steamctl -l debug` to get detailed log)

steamctl -l debug authenticator add xader726
[DEBUG] steamctl: Parsed args: {'versions_report': None, 'log_level': 'debug', 'anonymous': False, 'user': None, 'password': None, 'command': 'authenticator', '_cmd_func': 'steamctl.commands.authenticator.cmds:cmd_authenticator_add', 'subcommand': 'add', 'force': False, 'from_secret': None, 'account': 'xader726'}
To add an authenticator, first we need to login to Steam
Account name: xader726
Enter password for 'xader726':
[DEBUG] urllib3.connectionpool: Starting new HTTPS connection (1): steamcommunity.com:443
[DEBUG] urllib3.connectionpool: https://steamcommunity.com:443 "POST /login/getrsakey/ HTTP/1.1" 200 404
[DEBUG] urllib3.connectionpool: https://steamcommunity.com:443 "POST /login/dologin/ HTTP/1.1" 200 128
Enter email code: #####
[DEBUG] urllib3.connectionpool: https://steamcommunity.com:443 "POST /login/dologin/ HTTP/1.1" 200 289
Traceback (most recent call last):
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\Xavier\AppData\Local\Programs\Python\Python39\Scripts\steamctl.exe\__main__.py", line 7, in <module>
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\site-packages\steamctl\__main__.py", line 59, in main
    rcode = cmd_func(args=args)
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\site-packages\steamctl\commands\authenticator\cmds.py", line 108, in cmd_authenticator_add
    wa.bcli_login(sa_instance=sa, auto_twofactor=bool(args.from_secret))
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\site-packages\steamctl\commands\authenticator\cmds.py", line 31, in bcli_login
    return self.login(password, captcha, email_code, twofactor_code)
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\site-packages\steam\webauth.py", line 209, in login
    self._finalize_login(resp)
  File "c:\users\xavier\appdata\local\programs\python\python39\lib\site-packages\steam\webauth.py", line 322, in _finalize_login
    data = json.loads(login_response['oauth'])
KeyError: 'oauth'

Versions Report

steamctl --versions-report

(Run steamctl --versions-report and paste the output below)

G:\>steamctl --versions-report
steamctl: 0.9.5

Dependencies:
               steam: 1.4.4
             appdirs: 1.4.4
         argcomplete: 3.1.1
                tqdm: 4.45.0
               arrow: 1.2.3
            pyqrcode: 1.2.1
      beautifulsoup4: 4.12.2
                 vpk: 1.4.0
                 vdf: 3.4
 gevent-eventemitter: 2.1
              gevent: 22.10.2
            greenlet: 2.0.2
              pyyaml: Not Installed
       pycryptodomex: 3.18.0
            protobuf: 3.20.3

Python runtime:
          executable: c:\users\xavier\appdata\local\programs\python\python39\python.exe
             version: 3.9.0 (tags/v3.9.0:9cf6752, Oct  5 2020, 15:34:40) [MSC v.1927 64 bit (AMD64)]
            platform: win32

System info:
              system: Windows
             machine: AMD64
             release: 10
             version: 10.0.19041

[Xader726]

Found this issue with the same error for "_finalize_login" on the steam repo from 2 weeks ago, seems to be related. ValvePython/steam#442