database.py

import sqlite3

conn = sqlite3.connect("users.db", check_same_thread=False)
cursor = conn.cursor()

cursor.execute("""
CREATE TABLE IF NOT EXISTS users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT,
    email TEXT UNIQUE,
    password TEXT
)
""")

conn.commit()


def add_user(name, email, password):
    try:
        cursor.execute(
            "INSERT INTO users (name,email,password) VALUES (?,?,?)",
            (name, email, password)
        )
        conn.commit()
        return True
    except:
        return False


def user_exists(email):
    cursor.execute("SELECT * FROM users WHERE email=?", (email,))
    return cursor.fetchone()


def verify_login(email, password):
    cursor.execute(
        "SELECT * FROM users WHERE email=? AND password=?",
        (email, password)
    )
    return cursor.fetchone()