public static async Task Run()

in OneDriveAlexaSkill/OneDriveAlexaSkill/Skill.cs [23:86]
55 lines of code
8 McCabe index (conditional complexity)

        public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest req, ILogger log)
        {
            var json = await req.ReadAsStringAsync();
            var skillRequest = JsonConvert.DeserializeObject<SkillRequest>(json);

            // Verifies that the request is indeed coming from Alexa.
            var isValid = await skillRequest.ValidateRequest(req, log);
            if (!isValid)
            {
                return new BadRequestResult();
            }

            var request = skillRequest.Request;
            var token = skillRequest.Session.User.AccessToken;

            var client = GetAuthenticatedClientForUser(token);

            SkillResponse response = null;

            try
            {
                if (request is LaunchRequest launchRequest)
                {
                    log.LogInformation("Session started");
                    var me = await client.Me.Request().GetAsync();
                    response = ResponseBuilder.Tell($"Hello {me.DisplayName}");
                    response.Response.ShouldEndSession = false;
                }
                else if (request is IntentRequest intentRequest)
                {
                    // Checks whether to handle system messages defined by Amazon.
                    var systemIntentResponse = HandleSystemIntentRequest(intentRequest);
                    if (systemIntentResponse.IsHandled)
                    {
                        response = systemIntentResponse.Response;
                    }
                    else
                    {
                        if (intentRequest.Intent.Name == "OneDriveQuota")
                        {
                            log.LogInformation($"Request url: {client.Me.Drive.Request().RequestUrl}");
                            var drive = await client.Me.Drive.Request().GetAsync();
                            int used = ConvertBytesToTereabytes(drive.Quota.Used);
                            int total = ConvertBytesToTereabytes(drive.Quota.Total);

                            response = ResponseBuilder.Tell($"You are using {used} GB out of a total of {total} GB");
                        }
                    }
                }
                else if (request is SessionEndedRequest sessionEndedRequest)
                {
                    log.LogInformation("Session ended");
                    response = ResponseBuilder.Empty();
                    response.Response.ShouldEndSession = true;
                }
            }
            catch (Exception exc)
            {
                log.LogError(exc, "Error getting the response");
                response = ResponseBuilder.Tell("I'm sorry, there was an unexpected error. Please, try again later.");
            }

            return new OkObjectResult(response);
        }