empty password in dtool config file not possible

[RLeute]

I recognized with Sarah that an empty password in ".config/dtool/dtool.json" leads to an error when executing dtool ls smb://isilon
We see the following error:

[fr_se159@login1 dtool]$ dtool ls smb://isilon
Traceback (most recent call last):
File "/home/fr/fr_fr/fr_se159/.local/bin/dtool", line 11, in
load_entry_point('dtool-cli==0.7.0', 'console_scripts', 'dtool')()
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/click/core.py", line 829, in call
return self.main(*args, **kwargs)
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/click/core.py", line 782, in main
rv = self.invoke(ctx)
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/click/core.py", line 1259, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/click/core.py", line 610, in invoke
return callback(*args, **kwargs)
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/dtool_info/dataset.py", line 182, in ls
if dtoolcore._is_dataset(uri, CONFIG_PATH):
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/dtoolcore/init.py", line 85, in _is_dataset
return storage_broker.has_admin_metadata()
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/dtool_smb/storagebroker.py", line 436, in has_admin_metadata
return self._path_exists(self.get_admin_metadata_key())
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/dtool_smb/storagebroker.py", line 280, in _path_exists
self.conn.getAttributes(self.service_name, path)
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/smb/SMBConnection.py", line 265, in getAttributes
self._getAttributes(service_name, path, cb, eb, timeout)
File "/home/fr/fr_fr/fr_se159/.local/lib/python3.6/site-packages/smb/base.py", line 741, in _getAttributes_SMB2
raise NotReadyError('SMB connection not authenticated')
smb.base.NotReadyError: SMB connection not authenticated

We have tested: <"">, <"None">, < None >, <>
as empty passwords where everything in between <> is meant.