Fix reconnection after failed authentication

See HandyHat#14 for discussion of issue

custom_components/hildebrandglow_dcc/glow.py

@@ -47,7 +47,8 @@ def authenticate(cls, app_id: str, username: str, password: str) -> Dict[str, An
         pprint(data)
         raise InvalidAuth
 
-    async def handle_failed_auth(self, config: ConfigEntry, hass: HomeAssistant) -> None:
+    @classmethod    
+    async def handle_failed_auth(cls, config: ConfigEntry, hass: HomeAssistant) -> None:
         """Attempt to refresh the current Glow token."""
         glow_auth = await hass.async_add_executor_job(
             Glow.authenticate,