public override async Task GetProfileDataAsync(ProfileDataRequestContext ctx)
        {
            var subject             = ctx.Subject;
            var requestedClaimTypes = ctx.RequestedClaimTypes;

            if (subject == null)
            {
                throw new ArgumentNullException("subject");
            }

            TKey key  = ConvertSubjectToKey(subject.GetSubjectId());
            var  acct = await userManager.FindByIdAsync(key);

            if (acct == null)
            {
                throw new ArgumentException("Invalid subject identifier");
            }

            var claims = await GetClaimsFromAccount(acct);

            if (requestedClaimTypes != null && requestedClaimTypes.Any())
            {
                claims = claims.Where(x => requestedClaimTypes.Contains(x.Type));
            }

            ctx.IssuedClaims = claims;
        }
        public async Task TestMethod0()
        {
            IdentityTableContext<IdentityUser> context = new IdentityTableContext<IdentityUser>(
                 new CloudStorageAccount(new StorageCredentials("c1azuretests", File.ReadAllText("C:\\dev\\storagekey.txt")), true));


            var store = new UserStore<IdentityUser>(context);
            var mgr = new Microsoft.AspNet.Identity.UserManager<IdentityUser>(store);

            var obj = await mgr.FindAsync(new UserLoginInfo("google", "notfound"));

            Assert.IsNull(obj);

            var username="******"+Guid.NewGuid().ToString().Substring(0,5);
            var user = new IdentityUser(username);
            var result = await mgr.CreateAsync(user);

            Trace.WriteLine(string.Join(", ", result.Errors));
            Assert.AreEqual(0, result.Errors.Count());


            var userFromDb = await mgr.FindByIdAsync(user.Id);
           Assert.IsNotNull(userFromDb); 

            


        }