public async Task<bool> Register(string email, string password, string confirmPassword)
 {
     var registerModel = new RegisterBindingModel()
     {
         Email = email,
         Password = password,
         ConfirmPassword = confirmPassword
     };
     var response = await _client.PostAsJsonAsync("api/Account/Register", registerModel);
     if (!response.IsSuccessStatusCode)
     {
         return false;
     }
     return true;
 }
        public async Task<IHttpActionResult> Register(RegisterBindingModel model)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            var user = new ApplicationUser() { UserName = model.Email, Email = model.Email };

            IdentityResult result = await UserManager.CreateAsync(user, model.Password);

            if (!result.Succeeded)
            {
                return GetErrorResult(result);
            }

            return Ok();
        }