text: """Config flow to configure the OpenUV component."""
  from pyopenuv import Client
  from pyopenuv.errors import OpenUvError
  import voluptuous as vol
  
  from homeassistant import config_entries
  from homeassistant.const import (
      CONF_API_KEY,
      CONF_ELEVATION,
      CONF_LATITUDE,
      CONF_LONGITUDE,
  )
  from homeassistant.helpers import aiohttp_client, config_validation as cv
  
  from .const import DOMAIN
  
  CONFIG_SCHEMA = vol.Schema(
      {
          vol.Required(CONF_API_KEY): str,
          vol.Inclusive(CONF_LATITUDE, "coords"): cv.latitude,
          vol.Inclusive(CONF_LONGITUDE, "coords"): cv.longitude,
          vol.Optional(CONF_ELEVATION): vol.Coerce(float),
      }
  )
  
  
  class OpenUvFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
      """Handle an OpenUV config flow."""
  
      VERSION = 2
  
      async def _show_form(self, errors=None):
          """Show the form to the user."""
          return self.async_show_form(
              step_id="user",
              data_schema=CONFIG_SCHEMA,
              errors=errors if errors else {},
          )
  
      async def async_step_import(self, import_config):
          """Import a config entry from configuration.yaml."""
          return await self.async_step_user(import_config)
  
      async def async_step_user(self, user_input=None):
          """Handle the start of the config flow."""
          if not user_input:
              return await self._show_form()
  
          if user_input.get(CONF_LATITUDE):
              identifier = f"{user_input[CONF_LATITUDE]}, {user_input[CONF_LONGITUDE]}"
          else:
              identifier = "Default Coordinates"
  
          await self.async_set_unique_id(identifier)
          self._abort_if_unique_id_configured()
  
          websession = aiohttp_client.async_get_clientsession(self.hass)
          client = Client(user_input[CONF_API_KEY], 0, 0, websession)
  
          try:
              await client.uv_index()
          except OpenUvError:
              return await self._show_form({CONF_API_KEY: "invalid_api_key"})
  
          return self.async_create_entry(title=identifier, data=user_input)
  