public void getUserByIdDB()
{
for (int i = 0; i < 4; i++)
{
db.RegisterUser("test" + i, "" + i, "email" + i, null);
}
Assert.AreEqual(db.getUserById(db.Login("test0", "0")).id, db.getUserByEmail("email0").id);
Assert.AreNotEqual(db.getUserById(db.Login("test1", "1")).id, db.getUserByEmail("email2").id);
}