public void TestDUserRetrieveEmail()
{
User user = new User();
Assert.IsTrue(user.RetrieveUserByEmail(payload.Email));
Assert.AreEqual(user.FirstName, payload.FirstName);
Assert.AreEqual(user.LastName, payload.LastName);
Assert.AreEqual(Guid, user.UserGUID.ToString());
Assert.AreEqual(user.Password, payload.Password);
}