public async Task <IActionResult> Get(RegistrationModel model, CancellationToken cancellationToken = default)
        {
            if (!_licenseKeyValidatorService.IsValid(model.LicenseKey))
            {
                ModelState.AddModelError(nameof(model.LicenseKey), "LicenseKey is invalid");
            }

            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            try
            {
                return(Ok(await _remoteSignService.SignJson(JsonSerializer.Serialize(model), cancellationToken)));
            }
            catch (Exception ex)
            {
                return(StatusCode((int)HttpStatusCode.InternalServerError, ex.Message));
            }
        }