text: """Config flow for Wallbox integration."""
  from __future__ import annotations
  
  from typing import Any
  
  import voluptuous as vol
  from wallbox import Wallbox
  
  from homeassistant import config_entries, core
  from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
  from homeassistant.data_entry_flow import FlowResult
  
  from . import InvalidAuth, WallboxCoordinator
  from .const import CONF_STATION, DOMAIN
  
  COMPONENT_DOMAIN = DOMAIN
  
  STEP_USER_DATA_SCHEMA = vol.Schema(
      {
          vol.Required(CONF_STATION): str,
          vol.Required(CONF_USERNAME): str,
          vol.Required(CONF_PASSWORD): str,
      }
  )
  
  
  async def validate_input(
      hass: core.HomeAssistant, data: dict[str, Any]
  ) -> dict[str, str]:
      """Validate the user input allows to connect.
  
      Data has the keys from STEP_USER_DATA_SCHEMA with values provided by the user.
      """
      wallbox = Wallbox(data["username"], data["password"])
      wallbox_coordinator = WallboxCoordinator(data["station"], wallbox, hass)
  
      await wallbox_coordinator.async_validate_input()
  
      # Return info that you want to store in the config entry.
      return {"title": "Wallbox Portal"}
  
  
  class ConfigFlow(config_entries.ConfigFlow, domain=COMPONENT_DOMAIN):
      """Handle a config flow for Wallbox."""
  
      def __init__(self) -> None:
          """Start the Wallbox config flow."""
          self._reauth_entry: config_entries.ConfigEntry | None = None
  
      async def async_step_reauth(
          self, user_input: dict[str, Any] | None = None
      ) -> FlowResult:
          """Perform reauth upon an API authentication error."""
          self._reauth_entry = self.hass.config_entries.async_get_entry(
              self.context["entry_id"]
          )
  
          return await self.async_step_user()
  
      async def async_step_user(
          self, user_input: dict[str, Any] | None = None
      ) -> FlowResult:
          """Handle the initial step."""
          if user_input is None:
              return self.async_show_form(
                  step_id="user",
                  data_schema=STEP_USER_DATA_SCHEMA,
              )
  
          errors = {}
  
          try:
              await self.async_set_unique_id(user_input["station"])
              if not self._reauth_entry:
                  self._abort_if_unique_id_configured()
                  info = await validate_input(self.hass, user_input)
                  return self.async_create_entry(title=info["title"], data=user_input)
              if user_input["station"] == self._reauth_entry.data[CONF_STATION]:
                  self.hass.config_entries.async_update_entry(
                      self._reauth_entry, data=user_input, unique_id=user_input["station"]
                  )
                  self.hass.async_create_task(
                      self.hass.config_entries.async_reload(self._reauth_entry.entry_id)
                  )
                  return self.async_abort(reason="reauth_successful")
              errors["base"] = "reauth_invalid"
          except ConnectionError:
              errors["base"] = "cannot_connect"
          except InvalidAuth:
              errors["base"] = "invalid_auth"
  
          return self.async_show_form(
              step_id="user",
              data_schema=STEP_USER_DATA_SCHEMA,
              errors=errors,
          )
  