private async Task SignIn(Account account)
 {
 }
        private async Task ExecuteSignUpUserCommand()
        {
            if (IsBusy)
            {
                return;
            }

            IsBusy = true;

            var user = new User
            {
                Name = string.Format("{0} {1}", FirstName, LastName),
                //ProfileImage = GravatarService.CalculateUrl(Email)
            };

            var account = new Account
            {
                Username = Username,
                Password = Password,
                Email = Email,
                UserId = user.Id
            };


        }
 private async Task CreateAccount(Account account, User user)
 {
 }