Connect Your Amazon Advertising Account
Once you register for a Merch Jar account, you will be taken to a page to connect your Amazon Advertising account to Merch Jar using the Amazon Advertising API.
Click the 'Login with Amazon' button to be taken to Amazon’s login page.
Enter your Amazon Advertising login credentials and click 'Sign-In'.
Click 'Allow' to grant Merch Jar access to your data.
With a successful login, your Amazon Advertising account will be connected to your Merch Jar account. It can take from 10 to 30 minutes for the initial syncing process to complete.