public async Task <IActionResult> Post([FromBody] RegistrationRequest request,
                                               [FromServices] IAuthenticationManager authentication,
                                               [FromServices] RemoteBillingService billingService,
                                               [FromServices] IEmailConfirmationService emailConfirmationService,
                                               [FromServices] ICryptoProviderService cryptoProvider)
        {
            try {
                var value     = Convert.FromBase64String(request.InitCms);
                var xml       = new UTF8Encoding(false).GetString(value);
                var encrypted = XmlSerializationHelper.DeserializeFromXml <string>(xml);
                var decrypted = AesHelper.Decrypt(encrypted);
                var isValid   = await cryptoProvider.VerifyCMSAsync(xml, request.SignedCms);

                if (!isValid)
                {
                    return(Json(ApiResponse.Failed(ApiErrorCode.ValidationError, "Сертификат не прошел проверку")));
                }
                var signUpDateTime = new DateTime(Convert.ToInt64(decrypted));
                if ((DateTime.Now - signUpDateTime).Hours > 0)
                {
                    return(Json(ApiResponse.Failed(ApiErrorCode.AuthenticationFailed, "С момента начала авторизации прошло больше часа")));
                }
            } catch {
                return(Json(ApiResponse.Failed(ApiErrorCode.AuthenticationFailed, "Сбой дешифрации сообщения")));
            }
            await authentication.RegisterAsync(request, billingService);

            string code;
            long   userId;

            if (!request.InvitedUser)
            {
                using (var repository = new Repository <User>(_provider)) {
                    var user = repository.Get(x => x.UserName == request.UserAccount.Email).Single();
                    code = emailConfirmationService.GenerateEmailConfirmationToken(user);
                    repository.Update(user);
                    repository.Commit();
                    userId = user.Id;
                }

                var callbackUrl = Url.Action(
                    "ConfirmEmail",
                    "Registration",
                    new { userId = userId, code = code },
                    protocol: HttpContext.Request.Scheme);
                callbackUrl = callbackUrl.Replace("api/Registration/ConfirmEmail", "auth/confirmemail");
                emailConfirmationService.SendConfirmationUrl(request.UserAccount.Email, callbackUrl);
            }
            return(Json(ApiResponse.Success(true)));
        }