Write an empty string as value to the keyring if None is parsed and
return a None value if an empty string was parsed from the keyring.
CURA-7180_keyring_none_value
So there is an issue with keyring w.r.t. frozen installs (maybe also local). If you have pywin32 installed, it works fine locally. Take a note here, that a variant of this package, pywin32-ctypes, a rudimentary version of that package that works wholly within python, is already installed as its a dependency for keyring on windows. Due to an unknown reason, when running it fails to detect this, so some workaround is needed, _or_ the 'normal' pywin32 package should be installed. However, problems occurred when attempts where made to install pywin32 via cx_freeze. Then the actual workaround was encountered (https://github.com/jaraco/keyring/issues/468), which _should_ hopefully let use use the keyring on windows without needing the 'full' version of pywin32.
CURA-7180
The Windows Credential Manager allows for up to 256bits passwords. If a password longer than that
is attempted to be written, it will throw a BaseException.
CURA-7180
