async void SubmitButton_TouchUpInside(object sender, EventArgs e)
        {
            UsernameTextField.Enabled = false;
            PasswordTextField.Enabled = false;

            string username = UsernameTextField.Text;
            string password = PasswordTextField.Text;



            if (!string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(password))
            {
                if (!HelperMethods.IsValidPassword(password))
                {
                    HelperMethods.SendBasicAlert("Validation", "Passwords should contain letters and numbers and be at least 6 characters.");
                    PasswordTextField.Layer.BorderColor = UIColor.Red.CGColor;
                    PasswordTextField.Layer.BorderWidth = 1f;
                    UsernameTextField.Enabled           = true;
                    PasswordTextField.Enabled           = true;
                    return;
                }
                //Save username/password to settings

                Settings.Username = username;
                Settings.Password = password;



                LoadingOverlay loadingIndicator = new LoadingOverlay(this.View.Frame, "Loading ...");
                this.View.AddSubview(loadingIndicator);

                //AuthResponse

                BlobCache.LocalMachine.InvalidateObject <AuthResponse>(AuthResponse.getAuthResponse);

                AuthResponse response = await AuthResponse.GetAuthResponseAsync(0, Settings.Username, Settings.Password);

                Settings.AppID     = response.AppId;
                Settings.AuthToken = response.AuthToken;

                APIManager manager = new APIManager();

                {
                    //LoginResponse authResponse = await manager.loginUser(Settings.AppID, Settings.Username, Settings.Password, Settings.AuthToken);
                    LoginResponse authResponse = await manager.loginUser(Settings.AppID, Settings.Username, Settings.Password, Settings.AuthToken);

                    if (authResponse.AuthToken != null)
                    {
                        Settings.AppID     = authResponse.AppId;
                        Settings.UserID    = authResponse.MagAppUserId;
                        Settings.AuthToken = authResponse.AuthToken;
                    }
                    else
                    {
                        loadingIndicator.Hide();
                        String responseMessage = "";
                        if (authResponse.ResponseMsg != null && authResponse.ResponseMsg != string.Empty)
                        {
                            responseMessage = authResponse.ResponseMsg;
                        }
                        else
                        {
                            responseMessage = "Unable to authenticate user.";
                        }

                        if (responseMessage == "Incorrect Password")
                        {
                            MessageViewController messageViewController = (MessageViewController)Storyboard.InstantiateViewController("MessageViewController");
                            this.PresentViewController(messageViewController, true, null);
                        }
                        else
                        {
                            HelperMethods.SendBasicAlert("Login", responseMessage);
                        }
                        UsernameTextField.Enabled = true;
                        PasswordTextField.Enabled = true;
                        return;
                    }


                    try
                    {
                        var responseProfile = await manager.getUserProfile(Settings.AppID, Settings.Username, Settings.AuthToken, Settings.Password);

                        Settings.IsAmphibian    = responseProfile.C1 == 1;
                        Settings.IsCommercial   = responseProfile.C2 == 1;
                        Settings.IsExperimental = responseProfile.C3 == 1;
                        Settings.IsHelicopter   = responseProfile.C4 == 1;
                        Settings.IsJets         = responseProfile.C5 == 1;
                        Settings.IsSingles      = responseProfile.C7 == 1;
                        Settings.IsSingleEngine = responseProfile.C6 == 1;
                        Settings.IsTwinPistons  = responseProfile.C8 == 1;
                        Settings.IsTwinTurbines = responseProfile.C9 == 1;
                        Settings.IsVintage      = responseProfile.C10 == 1;
                        Settings.IsWarbirds     = responseProfile.C11 == 1;
                        Settings.IsLightSport   = responseProfile.C12 == 1;

                        Settings.Email = Settings.Username;

                        Settings.FirstName = responseProfile.FirstName;
                        Settings.LastName  = responseProfile.LastName;
                        Settings.Phone     = responseProfile.CellPhone;

                        Settings.Company                  = responseProfile.Company;
                        Settings.Hours                    = responseProfile.HourPerMonth;
                        Settings.ManufacturerId           = responseProfile.DesignationId;
                        Settings.LocationPickerSelectedId = responseProfile.CountryId;
                        Settings.Phone                    = responseProfile.CellPhone;
                        Settings.DesignationId            = responseProfile.DesignationId;
                        Settings.PurposeId                = responseProfile.FlyingPurposeId;
                        Settings.HomeAirport              = responseProfile.HomeAirport;
                        Settings.Password                 = responseProfile.Password;
                        Settings.PilotStatusId            = responseProfile.PilotStatusId;
                        Settings.PilotTypeId              = responseProfile.PilotTypeId;
                        Settings.PurchaseTimeFrame        = responseProfile.PurchaseTimeFrame;

                        loadingIndicator.Hide();
                        this.PerformSegue("LoadTabBarControllerSeque", this);
                    }
                    catch (Exception exe)
                    {
                        loadingIndicator.Hide();
                        HelperMethods.SendBasicAlert("Login", "Login Failed");
                    }
                }



                PasswordTextField.Layer.BorderColor = UIColor.Clear.CGColor;
                PasswordTextField.Layer.BorderWidth = 0f;

                UsernameTextField.Layer.BorderColor = UIColor.Clear.CGColor;
                UsernameTextField.Layer.BorderWidth = 0f;
            }
            else
            {
                //Update UI to reflect invalid username or password

                if (string.IsNullOrEmpty(username))
                {
                    UsernameTextField.Layer.BorderColor = UIColor.Red.CGColor;
                    UsernameTextField.Layer.BorderWidth = 1f;
                }
                else
                {
                    UsernameTextField.Layer.BorderColor = UIColor.Clear.CGColor;
                    UsernameTextField.Layer.BorderWidth = 0f;
                }

                if (string.IsNullOrEmpty(password))
                {
                    PasswordTextField.Layer.BorderColor = UIColor.Red.CGColor;
                    PasswordTextField.Layer.BorderWidth = 1f;
                }
                else
                {
                    PasswordTextField.Layer.BorderColor = UIColor.Clear.CGColor;
                    PasswordTextField.Layer.BorderWidth = 0f;
                }
            }

            UsernameTextField.Enabled = true;
            PasswordTextField.Enabled = true;
        }