revise account service dictionary

app.py

@@ -6,6 +6,7 @@ import gspread
 import pickle
 import os
 import csv
+import json
 import torch
 from tqdm.auto import tqdm
 from langchain.text_splitter import RecursiveCharacterTextSplitter
@@ -126,7 +127,9 @@ if "session_rating" not in st.session_state:
     st.session_state.session_rating = 0
 
 
-service_account = gspread.service_account_from_dict(st.secrets["google_sheet_credential"])
+credentials= json.loads(st.secrets['google_sheet_credential'])
+
+service_account = gspread.service_account_from_dict(credentials)
 workbook= service_account.open("aitGPT-qa-log")
 worksheet_qa = workbook.worksheet("Sheet1")
 worksheet_comment = workbook.worksheet("Sheet2")