getpass.getuser may fail

[Alex663]

getpass.getuser fails when called from containers and returns the following error.

  File ""/.pyenv/versions/python39_loaded/lib/python3.9/site-packages/nzpy/core.py"", line 1530, in __init__
    hs = handshake.Handshake(self._usock, self._sock, ssl, self.log)
  File ""/.pyenv/versions/python39_loaded/lib/python3.9/site-packages/nzpy/handshake.py"", line 76, in __init__
    self.guardium_clientOSUser = getuser()
  File ""/.pyenv/versions/3.9.10/lib/python3.9/getpass.py"", line 169, in getuser
    return pwd.getpwuid(os.getuid())[0]
KeyError: 'getpwuid(): uid not found: 10000'"

A similar issue was noted in a package called ansible and was resolved in ansible/ansible#68007