Disconnect your API Access
Please follow the below steps to completely disconnect your Amazon advertising/sales account with SellerApp.
Login to Amazon Advertising API (AAA) ( https://www.amazon.com/ap/adam)
See the apps.
Disconnect if the SellerApp application is a part of the box similar to the one below.
The next major step is to disconnect sales.
Log in to Seller Central with your personal id.
Navigate to settings -> User Permissions.
Under Third-party developer and apps, click on -> Visit Manage Your Apps.
If you see SellerApp listed there, you can click on-> Disable.
Now you have successfully disconnected your Amazon advertising/sales account from SellerApp.