public ActionResult Settings()
        {
            int id = WebSecurity.GetUserId(WebSecurity.CurrentUserName);
            UserProfile profile = _context.UserProfiles.First(x => x.UserId == id);

            SettingsViewModel viewModel = new SettingsViewModel();
            viewModel.PrivateKey = profile.PrivateKey;
            viewModel.PublicKey = profile.PublicKey;

            return View(viewModel);
        }
        public ActionResult Settings(SettingsViewModel model)
        {
            try
            {

                if (!string.IsNullOrWhiteSpace(model.OldPassword) &&
                    !string.IsNullOrWhiteSpace(model.NewPassword) &&
                    !string.IsNullOrWhiteSpace(model.ConfirmNewPassword))
                {

                    if (model.NewPassword == model.ConfirmNewPassword)
                    {
                        if (!WebSecurity.ChangePassword(User.Identity.Name, model.OldPassword, model.NewPassword))
                        {
                            ModelState.AddModelError("OldPassword", "Incorrect password");
                            return View(model);
                        }
                    }
                    else
                    {
                        ModelState.AddModelError("NewPassword", "");
                        ModelState.AddModelError("ConfirmNewPassword", "Passwords don't match");
                        return View(model);
                    }

                }
                int id = WebSecurity.GetUserId(WebSecurity.CurrentUserName);
                UserProfile profile = _context.UserProfiles.First(x => x.UserId == id);
                profile.PublicKey = model.PublicKey;
                profile.PrivateKey = model.PrivateKey;
                _context.SaveChanges();

            }
            catch (Exception ex)
            {

                return View("Error");
            }

            TempData["Notification"] = new Notification("Changes have been saved successfuly.", Nature.success);
            return View(model);
        }