private async void loginButton_Click(object sender, RoutedEventArgs e)
        {
            var username = this.usernameBox.Text;
            var password = this.passwordBox.Text;

            var serverURL = "http://localhost:3000/users/login";

            var values = new List<KeyValuePair<string, string>>
                    {
                        new KeyValuePair<string, string>("email", username),
                        new KeyValuePair<string, string>("password", password)
                    };
            var httpClient = new HttpClient(new HttpClientHandler());
            var message = new FormUrlEncodedContent(values);
            HttpResponseMessage response = await httpClient.PostAsync(serverURL, message);
            try
            {
                response.EnsureSuccessStatusCode();
                var responseString = await response.Content.ReadAsStringAsync();
            }
            catch (System.Net.Http.HttpRequestException exception)
            {
                this.errorText.Text = "Error occured when trying to connect.";
            }

        }