postLabels method 
    
    
  Create a label
Parameters:
 
    
  Implementation
  Future<LabelResponse> postLabels(
    LabelCreateRequest labelCreateRequest) async {
  final response = await postLabelsWithHttpInfo(labelCreateRequest);
  if (response.statusCode >= HttpStatus.badRequest) {
    throw ApiException(response.statusCode, await _decodeBodyBytes(response));
  }
  // When a remote server returns no body with a status of 204, we shall not decode it.
  // At the time of writing this, `dart:convert` will throw an "Unexpected end of input"
  // FormatException when trying to decode an empty string.
  if (response.statusCode != HttpStatus.noContent) {
    return await apiClient.deserializeAsync(
      await _decodeBodyBytes(response),
      'LabelResponse',
    ) as LabelResponse;
  }
  throw ApiException(response.statusCode, await _decodeBodyBytes(response));
}