ResponseFetcher.cs:

        public Task<T> GetApiResponseAsync(string url)
        {
            using (var client = new HttpClient()) {

                var response = await client.GetAsync(url).ConfigureAwait(false);
                var content = await response.Content.ReadAsStringAsync().ConfigureAwait(false);

                return JsonConvert.DeserializeObject<T>(content);
            }
        }

---------------------
LoginViewModel.cs:

// Passing the task to RunTask():

        ResponseFetcher<Task> task = new ResponseFetcher<Task>("http://10.0.0.141:5000/");

        await task.GetApiResponseAsync("api/accounts/verify?username=test&password=test");

Error: Start may not be called on a promise-style task.