await open_account(ctx.author)    users = await get_bank_data()    earnings = (a_var3)    users[str(discord.user.id)]["Simp Wallet"] += earnings@bot.command()async def balance(ctx):    await open_account(ctx.author)    users = await get_bank_data()    wallet_amt = users[str(user.id)]["Simp Wallet"] = 0    bank_amt =  users[str(user.id)]["Simp Bank"] = 0    em = discord.Embed(title = f"{ctx.author.name}'s Balance")    em.add_field(name = "Simp Wallet", value = wallet_amt)    em.add_field(name = "Simp Bank", value = bank_amt)    await ctx.send(embed = em)async def open_account(user):    users = await get_bank_data()    if str(user.id) is users:        return False    else:        users[str(user.id)]["Simp Wallet"] = 0        users[str(user.id)]["Simp Bank"] = 0    with open('mainbank.json',"w") as f:        json.dump(users,f)    return Trueasync def get_bank_data():    with open('mainbank.json',"r") as f:        users = json.load(f)    return usersDiscord.ext.commands.errors.CommandInvokeError：命令引發(fā)異常：KeyError：'594750729810477063'。就是這么說(shuō)的。我不是這方面的專家，所以，任何幫助將不勝感激！完整回溯如下：The above exception was the direct cause of the following exception:Traceback (most recent call last):  File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\ext\commands\bot.py", line 903, in invoke    await ctx.command.invoke(ctx)  File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\ext\commands\core.py", line 859, in invoke    await injected(*ctx.args, **ctx.kwargs)  File "C:\Users\Admin\AppData\Local\Programs\Python\Python38-32\lib\site-packages\discord\ext\commands\core.py", line 94, in wrapped    raise CommandInvokeError(exc) from excdiscord.ext.commands.errors.CommandInvokeError: Command raised an exception: KeyError: '345878244756684801'