Close aiohttp connection when probing API

After checking the API credentials, the `Stromer` instance is dropped,
and thus we should close the aiohttp session as well.

Author: dbrgn

custom_components/stromer/config_flow.py

@@ -31,10 +31,12 @@ async def validate_input(_: HomeAssistant, data: dict[str, Any]) -> dict:
     client_id = data[CONF_CLIENT_ID]
     client_secret = data.get(CONF_CLIENT_SECRET, None)
 
-    # Initialize connection to stromer
+    # Initialize connection to stromer to validate credentials
     stromer = Stromer(username, password, client_id, client_secret)
     if not await stromer.stromer_connect():
         raise InvalidAuth
+    LOGGER.debug("Credentials validated successfully")
+    await stromer.stromer_disconnect()
 
     # All bikes information available
     all_bikes = await stromer.stromer_detect()

custom_components/stromer/stromer.py

@@ -27,6 +27,8 @@ def __init__(self, username: str, password: str, client_id: str, client_secret:
             self._api_version = "v3"
         self.base_url: str = "https://api3.stromer-portal.ch"
 
+        LOGGER.debug("Initializing Stromer with API version %s", self._api_version)
+
         self._timeout: int = timeout
         self._username: str = username
         self._password: str = password
@@ -43,6 +45,7 @@ def __init__(self, username: str, password: str, client_id: str, client_secret:
 
     async def stromer_connect(self) -> dict:
         """Connect to stromer API."""
+        LOGGER.debug("Creating aiohttp session")
         aio_timeout = aiohttp.ClientTimeout(total=self._timeout)
         self._websession = aiohttp.ClientSession(timeout=aio_timeout)
 
@@ -56,6 +59,11 @@ async def stromer_connect(self) -> dict:
 
         return True
 
+    async def stromer_disconnect(self) -> None:
+        """Close API web session."""
+        LOGGER.debug("Closing aiohttp session")
+        await self._websession.close()
+
     async def stromer_detect(self) -> dict:
         """Get full data (to determine bike(s))."""
         try: