To disconnect IFTTT from your Automower® Connect account you need to remove the Husqvarna Automower® service from your IFTTT account.
Login to IFTTT using the account that you no longer want to use to control your Automower® robotic mower.
Click your email address to access your account settings.
Select My Services > Husqvarna Automower®.
Click the settings symbol and click Remove.
Your Automower® Connect account is now no longer connected to the IFTTT account.