core: Not able to connect Lametric Time with the new integration

The problem

When I try to connect a Lametric Time with the new integration (with connection to Lametric dev site or by providing manually the api key), I have an « unexpected error ». It was working well with the previous configuration in the yaml file.

What version of Home Assistant Core has the issue?

2022.9.0

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Lametric

Link to integration documentation on our website

https://www.home-assistant.io/integrations/lametric

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Logger: homeassistant.components.lametric
Source: components/lametric/config_flow.py:221 
Integration: LaMetric ([documentation](https://www.home-assistant.io/integrations/lametric), [issues](https://github.com/home-assistant/home-assistant/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+lametric%22)) 
First occurred: 22:28:11 (5 occurrences) 
Last logged: 22:34:51

Unexpected error occurred
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/lametric/config_flow.py", line 180, in async_step_cloud_select_device
    return await self._async_step_create_entry(
  File "/usr/src/homeassistant/homeassistant/components/lametric/config_flow.py", line 221, in _async_step_create_entry
    device = await lametric.device()
  File "/usr/local/lib/python3.10/site-packages/demetriek/device.py", line 113, in device
    return Device.parse_obj(response)
  File "pydantic/main.py", line 526, in pydantic.main.BaseModel.parse_obj
  File "pydantic/main.py", line 342, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 2 validation errors for Device
wifi -> encryption
  field required (type=value_error.missing)
wifi -> rssi
  none is not an allowed value (type=type_error.none.not_allowed)

Additional information

No response