public String getCustomDomain() {
        return this.customDomain;
    }
<p>
A custom domain name that you provide to Amazon Cognito. This parameter applies only if you use a custom domain
to host the sign-up and sign-in pages for your application. An example of a custom domain name might be
<code>auth.example.com</code>.
</p>
<p>
For more information about adding a custom domain to your user pool, see <a
href="https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-add-custom-domain.html">Using
Your Own Domain for the Hosted UI</a>.
</p>

@return A custom domain name that you provide to Amazon Cognito. This parameter applies only if you use a custom
        domain to host the sign-up and sign-in pages for your application. An example of a custom domain name
        might be <code>auth.example.com</code>.</p>
        <p>
        For more information about adding a custom domain to your user pool, see <a href=
        "https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-add-custom-domain.html"
        >Using Your Own Domain for the Hosted UI</a>.
aws-java-sdk-cognitoidp/src/main/java/com/amazonaws/services/cognitoidp/model/UserPoolType.java