Create an application, if you do not have it yet.
There are 2 ways to find the «Client ID» of your store’s «Login with Amazon» application:
Way 1
Step 1.1
Open your store’s «Login with Amazon» application.
Step 1.2
You will find your application’s «Client ID» in the «Web Settings» section:
Way 2
Step 2.1
Open your «Login and Pay with Amazon» Credentials.
Step 2.2
Look for the «Login with Amazon Account Information» block, and then:
- Choose your application in the «Application Name» dropdown
- Look for your «Client ID»