text: """Config flow to configure the Ambient PWS component."""
  from __future__ import annotations
  
  from aioambient import API
  from aioambient.errors import AmbientError
  import voluptuous as vol
  
  from homeassistant import config_entries
  from homeassistant.const import CONF_API_KEY
  from homeassistant.data_entry_flow import FlowResult
  from homeassistant.helpers import aiohttp_client
  
  from .const import CONF_APP_KEY, DOMAIN
  
  
  class AmbientStationFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
      """Handle an Ambient PWS config flow."""
  
      VERSION = 2
  
      def __init__(self) -> None:
          """Initialize the config flow."""
          self.data_schema = vol.Schema(
              {vol.Required(CONF_API_KEY): str, vol.Required(CONF_APP_KEY): str}
          )
  
      async def _show_form(self, errors: dict | None = None) -> FlowResult:
          """Show the form to the user."""
          return self.async_show_form(
              step_id="user",
              data_schema=self.data_schema,
              errors=errors if errors else {},
          )
  
      async def async_step_user(self, user_input: dict | None = None) -> FlowResult:
          """Handle the start of the config flow."""
          if not user_input:
              return await self._show_form()
  
          await self.async_set_unique_id(user_input[CONF_APP_KEY])
          self._abort_if_unique_id_configured()
  
          session = aiohttp_client.async_get_clientsession(self.hass)
          api = API(user_input[CONF_APP_KEY], user_input[CONF_API_KEY], session=session)
  
          try:
              devices = await api.get_devices()
          except AmbientError:
              return await self._show_form({"base": "invalid_key"})
  
          if not devices:
              return await self._show_form({"base": "no_devices"})
  
          # The Application Key (which identifies each config entry) is too long
          # to show nicely in the UI, so we take the first 12 characters (similar
          # to how GitHub does it):
          return self.async_create_entry(
              title=user_input[CONF_APP_KEY][:12], data=user_input
          )
  