"client_email": "default@quickstart-1565583639630.iam.gserviceaccount.com",

import gspread
from oauth2client.service_account import ServiceAccountCredentials
scope = ['https://spreadsheets.google.com/feeds','https://www.googleapis.com/auth/drive']
creds = ServiceAccountCredentials.from_json_keyfile_name('C:\\python\\google_api.json', scope)
client = gspread.authorize(creds)
GSpreadSheet = 'UploadByPython'
sh = client.open(GSpreadSheet)
yesterday = str((datetime.date.today()-datetime.timedelta(days=1)).strftime("%Y-%m-%d"))
#wks2 = sht.worksheet_by_title("Sheet2")
worksheet = sh.add_worksheet(title=yesterday, rows="100", cols="20")
worksheet.update_acell('A1', "Domian name")
worksheet.update_acell('B1', "flow (MB)")
listdomains = listdomain()
id = 1
for domain in listdomains:
    id = id + 1
    worksheet.update_acell('A'+str(id), domain)
    worksheet.update_acell('B'+str(id), flowdomain(yesterday,domain))

A2 -> (2,1)