code: public ServiceFuture<OperationStatus> addAsync(UUID appId, AddPermissionsOptionalParameter addOptionalParameter, final ServiceCallback<OperationStatus> serviceCallback) {
          return ServiceFuture.fromResponse(addWithServiceResponseAsync(appId, addOptionalParameter), serviceCallback);
      }
docs: Adds a user to the allowed list of users to access this LUIS application. Users are added using their email address.
  
  @param appId The application ID.
  @param addOptionalParameter the object representing the optional parameters to be set before calling this API
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object