Login with Amazon is a web service that enables Amazon customers to login to your web or mobile app using their
Amazon credentials.
Once they have logged in, your app can access some information from their Amazon profile.
Login with Amazon allows users to login to registered third party websites or apps (‘clients’) using their Amazon user name and password.
Clients may ask the user to share some personal information from their Amazon profile, including name, email address, and zip code.
LWA means «Login with Amazon».