how add some data inside sqlite database

i want to add some data inside my database .. i want to add the "admin" as default username and password for my program .. so that no need to register on first run of my program when i input username and password to my ediitext it will continue to go inside the admin activity..

this my coding to add some data

        UserCrud uCrud = new UserCrud(this);
        User user = new User();
        user.loguser = "admin";
        user.logpass = "admin";
        uCrud.insert(user);

this my crud operation to insert data inside my database public class UserCrud {

private DBHelper dbHelper;



public UserCrud(Context context){
    dbHelper = new DBHelper(context);
}

public int insert(User user){
    SQLiteDatabase db = dbHelper.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(User.KEY_priv, user.privl);
    values.put(User.KEY_username, user.username);
    values.put(User.KEY_usertype, user.usertype);
    values.put(User.KEY_sex, user.sex);
    values.put(User.KEY_usercompany, user.usercompany);
    values.put(User.KEY_usermail, user.usermail);
    values.put(User.KEY_usercontact, user.usercontact);
    values.put(User.KEY_useradd, user.useradd);
    values.put(User.KEY_loguser, user.loguser);
    values.put(User.KEY_logpass, user.logpass);
    values.put(User.KEY_logconfirm, user.logconfirmm);


    long user_Id = db.insert(User.TABLE, null, values);
    db.close();

    return (int) user_Id;

}

but when i run my app nothing happens ..