If your Kickstarter account was created with your Apple ID, you will need to manage your Apple login credentials via the Apple ID settings on your mobile device, or from your Apple account.
This is also where you can manage the apps on which you use Sign in with Apple. You will be able to turn off email forwarding (if you are using the relay email address), change your forwarding address, or stop using your Apple ID with an app too.
If you need help disconnecting your Kickstarter account from your Apple ID, please contact our Support team.