Why can not login if we insert the record manually into real Online Google Datastore, but can if we insert record via our system?

[Hung Ha]

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Ok, I got a small app, when registering a new acc, a user have to provide UserName Name Password If I register a new user via our system (Ex: Tom12, Tom, 123456), then I can login with userNameTom12 & password: 123456. Now, login online Google Datastore & manually insert this record into it: Ex: Tom13, Tom, 654321 But this time I can not login with user Name Tom13 & password 654321. So my question is that, does Google Datastore add some timestamps or something like that into the system that I can not log in?

[Hung Ha]

You can see the getUser function. Note that, the userNameis also the Key Name

public static User getUser(String userName){
    Key k = KeyFactory.createKey(personKey, "User", userName);
    try {
        Entity userEntity=datastore.get(k);
        //Entity userEntity=datastore.get(userName,personKey);
        if(userEntity!=null){
            User user=new User(userName);


            setUserFromUserEntity(user, userEntity);
            return user;
        }
    } catch (EntityNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

[Chad Vincent]

Where is it failing?  Is it failing to load the user, or failing to validate the password?

Is it possible your hash+salt for the password isn't getting set properly when you set via console?  (Is it deriving the salt from the app ID or namespace somehow?)