Configuring a user pool domain
After setting up an app client, you can configure the address of your sign-up and sign-in webpages. You can use an Amazon Cognito hosted domain and choose an available domain prefix, or you can use your own web address as a custom domain.
To add an app client and an Amazon Cognito hosted domain with the AWS Management Console, see Adding an app to enable the hosted web UI.
Note
You can't use the text aws, amazon, or cognito in the domain prefix.
