Login system with SQLite in Python

Im trying to do a system, login and register with database sqlite in Python. The register system is working, but the problem is the login part, when i insert login and password, always say Login failed

My code:

    con = sqlite3.connect("dados.db")
    cur = con.cursor() 
    passw = log.passw.text()
    user = log.user.text() 
    passcrypt = hashlib.sha256(passw.encode("utf-8")).hexdigest()
    cur.execute('SELECT user,senha FROM contas WHERE user=? AND senha=?', (user,passcrypt))
    if cur.fetchall():
        print("Logged")
    else: 
        print("Login failed")

How can i fix this? Always say Login failed.

source https://stackoverflow.com/questions/70406811/login-system-with-sqlite-in-python

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