public async Task <IMerchant> CreateAsync(IMerchant merchant)
{
IReadOnlyList <IMerchant> merchants = await _merchantRepository.FindAsync(merchant.ApiKey);
if (merchants.Count > 0)
{
throw new DuplicateMerchantApiKeyException(merchant.ApiKey);
}
IMerchant createdMerchant = await _merchantRepository.InsertAsync(merchant);
await _log.WriteInfoAsync(nameof(MerchantService), nameof(CreateAsync),
merchant.ToContext(),
"Merchant created");
return(createdMerchant);
}