Authentication no longer works with 3.0.15 on new core version (2026.5.4)

[andyrozman]

Describe the bug
It seems that reconfigure is failing with new core version (my credentials seems to have expired, and I had to do reconfigure)

To Reproduce
Steps to reproduce the behavior:

1. Go to Devices
2. Click on AlarmDotCom
3. Do reconfigure
4. On dialog it will be visible "Unknown error"... in logs there will be entry like you see in screenshot

Expected behavior
Reconfigure is successful.

Screenshots
File "/usr/src/homeassistant/homeassistant/helpers/http.py", line 89, in handle
result = await handler(request, **request.match_info)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/http/decorators.py", line 83, in with_admin
return await func(self, request, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/config/config_entries.py", line 234, in post
return await super().post(request, flow_id)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/components/http/data_validator.py", line 74, in wrapper
return await method(view, request, data, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/helpers/data_entry_flow.py", line 121, in post
result = await self._flow_mgr.async_configure(flow_id, data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 336, in async_configure
result = await self._async_configure(flow_id, user_input)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/config_entries.py", line 1554, in _async_configure
return await super()._async_configure(flow_id, user_input)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 383, in _async_configure
result = await self._async_handle_step(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
flow, cur_step["step_id"], user_input
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 483, in _async_handle_step
result: _FlowResultT = await getattr(flow, method)(user_input)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/config/custom_components/alarmdotcom/config_flow.py", line 136, in async_step_user
return await self.async_step_final()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/config/custom_components/alarmdotcom/config_flow.py", line 261, in async_step_final
return self.async_create_entry(title=self._config_title, data=self.config, options=CONF_OPTIONS_DEFAULT)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/config_entries.py", line 3367, in async_create_entry
raise HomeAssistantError(
...<2 lines>...
)
homeassistant.exceptions.HomeAssistantError: Creates a new entry in a 'reauth' flow, when it is expected to update an existing entry and abort

Home Assistant Version:
2026.5.4

Additional context
Add any other context about the problem here.