public async Task<IHttpActionResult> Register(RegisterBindingModel model)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

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

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

            // Attention - New version that processes claims
            // Study the RegisterBindingModel object that is passed into this method
            // Also, look at this text file in the root of the project:
            // Account-Register-request-bodies.txt
            // It has content that you can use in Fiddler

            if (result.Succeeded)
            {
                // Add claims
                await UserManager.AddClaimAsync(user.Id, new Claim(ClaimTypes.Email, model.Email));
                await UserManager.AddClaimAsync(user.Id, new Claim(ClaimTypes.Role, "User"));
                await UserManager.AddClaimAsync(user.Id, new Claim(ClaimTypes.GivenName, model.GivenName));
                await UserManager.AddClaimAsync(user.Id, new Claim(ClaimTypes.Surname, model.Surname));

                foreach (var role in model.Roles)
                {
                    await UserManager.AddClaimAsync(user.Id, new Claim(ClaimTypes.Role, role));
                }
            }
            else
            {
                return GetErrorResult(result);
            }

            return Ok();
        }
        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();
        }