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

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