bd = Bd_exec()
                bd.search_user(lg_hash)
                bd.search_user(revision=)
                print(revision)

 def search_user(self, lg_hash, revision):
        with sq.connect("2.db") as con:
            cur = con.cursor()
            search_lg = cur.execute("""SELECT name FROM users""").fetchone()
            if search_lg[0] == lg_hash:
                print("user exists")
                revision = 1
            else:
                print("user NOT exists")
                revision = 0
        return revision