Подключение БД не работает

import sqlite3
import sys,res,menu,time,os
import webbrowser
 
import ui_imagedialog
from PyQt6.QtWidgets import QApplication, QDialog,QFileDialog,QMainWindow,QLabel,QLineEdit,QPushButton,QGridLayout,QSizePolicy
from PyQt6 import QtWidgets,QtCore
from ui_imagedialog import Ui_ImageDialog
from AboutTheProgram import Ui_AboutTheProgram
from PyQt6.QtCore import Qt,QPoint
from PyQt6.QtSql import QSqlDatabase
 
db=sqlite3.connect('contacts.db')
coursor =db.cursor()
coursor.execute('''CREATE TABLE IF NOT EXISTS users(login TEXT,password TEXT) ''')
db.commit()
class MainWindows(QDialog,Ui_ImageDialog):
    homeAction = None
 
    oldPos = QPoint()
 
    def __init__(self):
        super().__init__()
        self.MainMenu = Ui_ImageDialog
        self.setupUi(self)
        #Кнопки
        self.pushClose.clicked.connect(self.CloseWindow)# При нажатии на кнопку login перейти на новую страницу
        self.pushUrlYouTube.clicked.connect(lambda: webbrowser.open('https://www.youtube.com/'))
        self.pushUrlDiscord.clicked.connect(lambda: webbrowser.open('https://discord.gg/JWTcSq3Y'))
        self.pushUrlFacebook.clicked.connect(lambda: webbrowser.open('https://www.facebook.com/rrarrkfacit'))
        self.pushUrlGitHub.clicked.connect(lambda: webbrowser.open('https://github.com/'))
        self.setWindowFlag(QtCore.Qt.WindowType.FramelessWindowHint)
 
        #bd
        self.pushLogin.clicked.connect(self.login)
 
    def login(self):
        user_login = self.lineEdit.text()
        user_password=self.lineEdit_2.text()
 
        if len(user_login)==0:
            return
        if len(user_password)==0:
            return
        cursor.execute(f'SELECT login FROM users WHERE login="{user_login}"')
        check_login = cursor.fetchall()
 
        cursor.execute(f'SELECT password FROM users WHERE password="{user_login}"')
        check_pass = cursor.fetchall()
 
        if check_pass[0][0] == user_password and check_login[0][0] == user_login:
            self.TransitionAboutTheProgram()
        else:
            print('error')
 
 
    def CloseWindow(self):
        sys.exit()
    def TransitionAboutTheProgram(self):
        abouttheprogram=AboutTheProgram()
        window.addWidget(abouttheprogram)
        window.setCurrentIndex(window.currentIndex()+1)
 
 
 
 
class AboutTheProgram(QDialog,Ui_AboutTheProgram):
    def __init__(self):
        super().__init__()
        self.abouttheprogram = Ui_AboutTheProgram
        self.setupUi(self)
 
 
if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    window = QtWidgets.QStackedWidget()
    window.setWindowFlags(Qt.WindowType.FramelessWindowHint)
    mainwindow=MainWindows()
    window.addWidget(mainwindow)
    window.setAttribute(QtCore.Qt.WidgetAttribute.WA_TranslucentBackground, True)
    window.resize(1280,720)
    window.show()
    sys.exit(app.exec())

    self.pushLogin.clicked.connect(self.login)
 
    def login(self):
        user_name=self.lineEdit.text()
        pass_word=self.lineEdit_2.text()
        db = sqlite3.connect('contacts.db')
        coursor = db.cursor()
        query = f'SELECT * FROM users WHERE username like \"{user_name}\" and password like \"{pass_word}\";'
        coursor.execute(query)
        result_pass = coursor.fetchone()
 
        if not result_pass:
            print('wrong 1')
        else:
            self.TransitionAboutTheProgram()

user_name = '%'
pass_word = '%'