public async Task UserAddToGroupAsync(string userId, string groupName, CancellationToken cancellationToken = default) { ValidateUserIdAndGroupName(userId, groupName); var api = await _restApiProvider.GetUserGroupManagementEndpointAsync(_appName, _hubName, userId, groupName); await _restClient.SendAsync(api, HttpMethod.Put, _productInfo, handleExpectedResponseAsync : null, cancellationToken : cancellationToken); }