I used the API to integrate Rachio with Home Assistant. The integration worked for months until today I got “Authentication Error”. I tried to re-add the integration and it won’t work. The app works OK. Please let me know if you need more information and thank you in advance!
You may be running into API usage limits. I would disable your integration for 24 hr and see if it starts working again.
Basic plugins use polling to get the data and often check for new data way too often. Ideally see if you can find an integration which supports the webhook notifications.