How to Manage App-specific Password
Once you have set two-factor authentication or two-step verification for your Apple ID, you can use an App-specific password to further enhance the security of Apple ID account. You can have up to 25 active app-specific passwords at any given time. If you need to, you can revoke passwords individually or all at once.
Step 1. Sign in to your Apple ID account page.
Step 2. In the Security section, click Edit.
Step 3. In the App Specific Passwords section, click View History.
Step 4, Then you can see a list of generated password. You can click the grey dot with "x" after each password, and revoke it.
After you revoke a password, the app using that password will be signed out of your account until you generate a new password and sign in again.
Any time you change or reset your primary Apple ID password, all of your app-specific passwords are revoked automatically to protect the security of your account. You'll need to generate new app-specific passwords for any apps that you want to continue using.
