我有一個小班，可以幫助我提取 salesforceobject 數據框和列。我對 simple_salesforce 包中的 SFType 有疑問。我正在嘗試從某個 Salesforce 對象的數據框中檢索列標題。這是我的課程的一個片段：from simple_salesforce import Salesforcefrom simple_salesforce import SFTypeimport pandas as pdimport numpy as npclass SfData:    def __init__(self,user,pw,token,obj):        self.user = user        self.pw = pw        self.token = token        self.sf = Salesforce(username = self.user,password = self.pw, security_token=self.token)        self.obj = obj    def retrieve_columns(self):        df = SFType(self.obj, self.sf.session_id, self.sf.sf_instance)        col_names = [x['name'] for x in self.sf.df.describe()['fields']]        return col_names調用該類后，調用該方法時出現以下錯誤：test.SfData(myuser,mypw,mytoken,"Account")test.retrieve_columns()Resource df Not Found. Response content: [{'errorCode': 'NOT_FOUND', 'message': 'The requested resource does not exist'}]