sign sync error

[Luci2015]

Description
Sign sync is failing because new attributes are present under the "settings" section of the JSON response for Sign accounts.
The UST error received is :

TypeError: __init__() missing 1 required positional argument: 'inherited'
2022-06-21 07:49:32 14656 ERROR asyncio - Task exception was never retrieved
future: <Task finished name='Task-11667' coro=<SignClient._get_user_groups() done, defined at sign_client\client.py:277> exception=TypeError("__init__() missing 1 required positional argument: 'inherited'")>
Traceback (most recent call last):
  File "sign_client\client.py", line 284, in _get_user_groups
  File "sign_client\model.py", line 197, in from_dict
  File "sign_client\model.py", line 197, in <listcomp>
  File "sign_client\model.py", line 185, in from_dict
  File "sign_client\model.py", line 166, in from_dict
  File "sign_client\model.py", line 166, in <dictcomp>
  File "sign_client\model.py", line 153, in from_dict

Steps to reproduce
Getting a particular Sign user info, contains this part:

"settings": {
                "userCanSend": {
                    "value": false,
                    "inherited": true
                },
                "libaryDocumentCreationVisible": {
                    "value": true,
                    "inherited": true
                },
                "sendRestrictedToWorkflows": {
                    "value": false
                },
                "userManagedWorkflowsEnabled": {
                    "value": false
                },
                "allowedToShareUserCreatedWorkflows": {
                    "value": false
                }

Cause can be found in the models.py, where 2 defaults are expected, when in fact inherited is optional in some cases:

@dataclass
class BooleanSettingsInfo:
    value: bool
    inherited: bool
    @classmethod
    def from_dict(cls, dct):
        return cls(**dct)

Expected behavior
UST should deal if inherited is present or not in the JSON.
Even if this part is dealt, the next problem will appear for the class SettingsInfo, because it has 3 default values expected and you can observe from the settings, there are now 5 statements.

This is how the defaults are set:

class SettingsInfo:
    libaryDocumentCreationVisible: BooleanSettingsInfo = None
    sendRestrictedToWorkflows: BooleanSettingsInfo = None
    userCanSend: BooleanSettingsInfo = None

Environment

• UST version: 2.7.3
• OS type and version: all
• Any other relevant info: