why does the bot doesnt send the db pycord

Question

My bot doesn't write changes on the DB when I type the command with the id What I want to do: write the commmand + the ID of the person -> the bot add the person ID and points in the DB -> send a message to say it worked

my code :

@bot.command()
@commands.has_permissions(administrator=True)
async def staff(ctx, user: Optional[discord.Member]):
    if user == None:
        await ctx.respond("Please add the staff id")
    else:
        db = sqlite3.connect("main.db")
        c = db.cursor()
        c.execute("SELECT points FROM staff WHERE id=?")
        results = c.fetchall()
        print(results)
        if len(results) == 0:
            c.execute(f"INSERT INTO staff(id, points) VALUES(?,?)", {user.id, 0})
            await ctx.respond("done")
        else:
            await ctx.respond("this already exists")
        db.commit()

I use sqlite3 DB

and in the console there is no error