public String getAppInstanceUserId() {
        return this.appInstanceUserId;
    }
<p>
The user ID of the <code>AppInstance</code>.
</p>

@return The user ID of the <code>AppInstance</code>.
aws-java-sdk-chimesdkidentity/src/main/java/com/amazonaws/services/chimesdkidentity/model/CreateAppInstanceUserRequest.java