/// <summary>
/// Asynchronously verifies that the request comes from PayPal and registers it.
/// </summary>
/// <param name="payPalRequestString">String of PayPal request.</param>
public async Task VerifyAndLogAsync(string payPalRequestString)
{
if (await _payPalVerificationService.IsVerifiedAsync(payPalRequestString).ConfigureAwait(false))
{
await ProcessPayPalRequestAsync(payPalRequestString).ConfigureAwait(false);
}
}