import threading
import socket
import sqlalchemy as db
from PySide6.QtCore import QCoreApplication
from PySide6.QtNetwork import QTcpServer, QTcpSocket, QHostAddress, QAbstractSocket
from passlib.hash import pbkdf2_sha256

server app bring username and password, cheking with username and password in table users in data base serverapp
if username and password from client app coincide with username and password in table users, then send to clientapp lastname and firstname from table users