code: public ServiceFuture<UserInner> createOrUpdateAsync(String deviceName, String name, String resourceGroupName, UserInner user, final ServiceCallback<UserInner> serviceCallback) {
          return ServiceFuture.fromResponse(createOrUpdateWithServiceResponseAsync(deviceName, name, resourceGroupName, user), serviceCallback);
      }
docs: Creates a new user or updates an existing user's information on a data box edge/gateway device.
  
  @param deviceName The device name.
  @param name The user name.
  @param resourceGroupName The resource group name.
  @param user The user details.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object