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


            var user = new TravelWithMeUser()
            {
                UserName = model.Name, Email = model.Email, PhoneNumber = model.PhoneNumber
            };

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

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

            return(Ok());
        }
        public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            var userManager = context.OwinContext.GetUserManager <ApplicationUserManager>();

            TravelWithMeUser user = await userManager.FindAsync(context.UserName, context.Password);

            if (user == null)
            {
                context.SetError("invalid_grant", "The user name or password is incorrect.");
                return;
            }

            ClaimsIdentity oAuthIdentity = await user.GenerateUserIdentityAsync(userManager,
                                                                                OAuthDefaults.AuthenticationType);

            ClaimsIdentity cookiesIdentity = await user.GenerateUserIdentityAsync(userManager,
                                                                                  CookieAuthenticationDefaults.AuthenticationType);

            AuthenticationProperties properties = CreateProperties(user.UserName);
            AuthenticationTicket     ticket     = new AuthenticationTicket(oAuthIdentity, properties);

            context.Validated(ticket);
            context.Request.Context.Authentication.SignIn(cookiesIdentity);
        }