Why does the Ignoring exception in command __balance: Traceback (most recent call last): error occur?

Question

Python

Here is the code itself:

@client.command(aliases = ['balance', 'cash'])
async def __balance(ctx, member: discord.Member = None):
    if member is None:
        await ctx.send(embed = discord.Embed(
            description = f"""Баланс пользователя **{ctx.author}** составляет **{cursor.execute("SELECT cash FROM users WHERE id = {}".format(ctx.author.id)).fetchone()[0]} :leaves:**""" 
        ))
        
    else:
        await ctx.send(embed = discord.Embed(
            description = f"""Баланс пользователя **{member}** составляет **{cursor.execute("SELECT cash FROM users WHERE id = {}".format(member.id)).fetchone()[0]} :leaves:**"""
        ))