public String getEndpointId() {
        return this.endpointId;
    }
<p>
The unique identifier of the <code>AppInstanceUserEndpoint</code>.
</p>

@return The unique identifier of the <code>AppInstanceUserEndpoint</code>.
aws-java-sdk-chimesdkidentity/src/main/java/com/amazonaws/services/chimesdkidentity/model/DeregisterAppInstanceUserEndpointRequest.java