Setup issue- synchronous HTTP calls

[philipohagan]

Hi! Thanks for building this - I got the below error on my home assistant install - running Home Assistant Core 2025.2.3

Logger: homeassistant.components.sensor
Source: helpers/entity_platform.py:738
integration: Sensor ([documentation](https://www.home-assistant.io/integrations/sensor), [issues](https://github.com/home-assistant/core/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+sensor%22))
First occurred: 22:16:48 (3 occurrences)
Last logged: 22:21:27

thames_water: Error on device update!
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 738, in _async_add_entity
    await entity.async_device_update(warning=False)
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1318, in async_device_update
    await self.async_update()
  File "/config/custom_components/thames_water/sensor.py", line 165, in async_update
    thames_water = ThamesWater(email=self._username, password=self._password, account_number=self._account_number)
  File "/usr/local/lib/python3.13/site-packages/thameswaterclient.py", line 57, in __init__
    self._authenticate(email, password)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/thameswaterclient.py", line 205, in _authenticate
    trans_token, csrf_token = self._authorize_b2c_1_tw_website_signin()
                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/local/lib/python3.13/site-packages/thameswaterclient.py", line 80, in _authorize_b2c_1_tw_website_signin
    r = self.s.get(url, params=params)
  File "/usr/local/lib/python3.13/site-packages/requests/sessions.py", line 602, in get
    return self.request("GET", url, **kwargs)
           ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/requests/sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.13/site-packages/requests/sessions.py", line 703, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.13/site-packages/requests/adapters.py", line 667, in send
    resp = conn.urlopen(
        method=request.method,
    ...<9 lines>...
        chunked=chunked,
    )
  File "/usr/local/lib/python3.13/site-packages/urllib3/connectionpool.py", line 716, in urlopen
    httplib_response = self._make_request(
        conn,
    ...<5 lines>...
        chunked=chunked,
    )
  File "/usr/local/lib/python3.13/site-packages/urllib3/connectionpool.py", line 416, in _make_request
    conn.request(method, url, **httplib_request_kw)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/urllib3/connection.py", line 244, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/http/client.py", line 1336, in request
    self._send_request(method, url, body, headers, encode_chunked)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/http/client.py", line 1347, in _send_request
    self.putrequest(method, url, **skips)
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/urllib3/connection.py", line 219, in putrequest
    return _HTTPConnection.putrequest(self, method, url, *args, **kwargs)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 193, in protected_loop_func
    raise_for_blocking_call(
    ~~~~~~~~~~~~~~~~~~~~~~~^
        func,
        ^^^^^
    ...<4 lines>...
        kwargs=kwargs,
        ^^^^^^^^^^^^^^
    )
    ^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 159, in raise_for_blocking_call
    raise RuntimeError(
    ...<8 lines>...
    )
RuntimeError: Caught blocking call to putrequest with args (<urllib3.connection.HTTPSConnection object at 0x7f4a82f4d0>, 'GET', '/identity.thameswater.co.uk/b2c_1_tw_website_signin/oauth2/v2.0/authorize?client_id=cedfde2d-79a7-44fd-9833-cae769640d3d&scope=openid+profile+offline_access&response_type=code&redirect_uri=https%3A%2F%2Fwww.thameswater.co.uk%2Flogin&response_mode=fragment&code_challenge=zw4TW9ML-n7R-8dEM-GxHz_cjdBDMt_e8WC5Z8d2qxE&code_challenge_method=S256&nonce=43115a86-0639-41a7-b6b8-5aebad07e5a8&state=a0ba4c07-c55d-4e29-b4f5-b8e520d097b4') inside the event loop by custom integration 'thames_water' at custom_components/thames_water/sensor.py, line 165: thames_water = ThamesWater(email=self._username, password=self._password, account_number=self._account_number). (offender: /usr/local/lib/python3.13/site-packages/urllib3/connection.py, line 219: return _HTTPConnection.putrequest(self, method, url, *args, **kwargs)), please create a bug report at hhttps://github.com/ale770/ha-thames-water/issues
For developers, please see https://developers.home-assistant.io/docs/asyncio_blocking_operations/#putrequest