public async Task <IActionResult> UnallocateUsersByUsername(UnallocateUsersRequest request)
        {
            _logger.LogDebug("UnallocateUsersByUsername");

            try
            {
                var response = await _testApiClient.UnallocateUsersAsync(request);

                _logger.LogInformation("Unallocated {count} user(s)", response.Count);
                return(Ok(response));
            }
            catch (TestApiException e)
            {
                _logger.LogError(e, "Unable to unallocate users: {usernames}", request.Usernames);
                return(StatusCode(e.StatusCode, e.Response));
            }
        }