Step 7: Implement Account Linking (VSK Echo Show)
Account linking allows your users to connect their Alexa identity to their account within your service. For example, suppose viewing your media requires users to sign up for an account and purchase a subscription. Account linking links the user's access in your services to the video skill on their device.
Once a user enables your skill and completes the account linking process, subsequent directives sent to your AWS Lambda include the access_token for the user so you can perform additional authentication, authorization, and personalization.
For a full description of account linking, including implementation details, see Understand Account Linking. If you would prefer not to implement account linking yourself, you can instead use Login With Amazon (LWA) for account linking. To do so, see the "Step 1" and "Step 2" procedures of the "Account Linking, Step by Step" section in the "Alexa Blogs" entry Alexa Account Linking.
Next Steps
Go on to Step 8: Test for Certification.