public LoginViewModel(ILoginService loginService, ISettingsService settingsService) { this.loginService = loginService; this.settingsService = settingsService; this.LoginCommand = new RelayCommand(async () => { Debug.WriteLine("Login..."); var token = await loginService.GetAccessTokenAsync(Username, Password); await this.settingsService.SaveItemAsync(token, "access_token"); Messenger.Default.Send(new NavigationMessage(typeof(FriendsPage), null)); }); }