code: public ServiceFuture<CredentialResultsInner> listClusterUserCredentialsAsync(String resourceGroupName, String resourceName, final ServiceCallback<CredentialResultsInner> serviceCallback) {
          return ServiceFuture.fromResponse(listClusterUserCredentialsWithServiceResponseAsync(resourceGroupName, resourceName), serviceCallback);
      }
docs: Gets cluster user credential of a managed cluster.
  Gets cluster user credential of the managed cluster with a specified resource group and name.
  
  @param resourceGroupName The name of the resource group.
  @param resourceName The name of the managed cluster resource.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object