def validateLogin():
    global username
    global password
    username_text = username.get()
    password_text = password.get()

    with sqlite3.connect("Timetable.db") as db:
        cursor = db.cursor()
    find_user = ("SELECT * FROM StudentInformation WHERE username = ? AND password = ?")
    cursor.execute(find_user,[(username_text),(password_text)])
    results = cursor.fetchall()
    if results:
        success()
    else:
        notFound()