如何从YouTube分析API的json文件中加载客户端凭据？

我想从朋友的YouTube频道检索获利数据。我使用下面的python代码从他那里获取身份验证凭据，然后将其保存到JSON文件中。在此过程中，他必须单击链接并将密钥发送给我。我想通过保存凭据数据来避免这种情况。我想我已经做到了，但是
现在如何加载呢？

import json
import os
import google.oauth2.credentials
import google_auth_oauthlib.flow
from googleapiclient.discovery import build
from googleapiclient.errors import httpError
from google_auth_oauthlib.flow import InstalledAppFlow

SCOPES = ['https://www.googleapis.com/auth/yt-analytics.readonly','https://www.googleapis.com/auth/yt-analytics-monetary.readonly']
API_service_name = 'youtubeAnalytics'
API_VERSION = 'v2'
CLIENT_SECRETS_FILE = 'client_secret_dota2rapier_youtube_analytics_api.json'
CLIENT_CREDENTIALS_FILE = 'credentials.json'
root = 'C:\\test\\'
os.chdir(root)


def get_service():
  flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRETS_FILE,SCOPES)
  credentials = flow.run_console()

  #SAVING CREDENTIALS DATA
  creds_data = {
      'token': credentials.token,'refresh_token': credentials.refresh_token,'token_uri': credentials.token_uri,'client_id': credentials.CLIENt_id,'client_secret': credentials.CLIENt_secret,'scopes': credentials.scopes
  }
  save = True
  if save:
      del creds_data['token']
      with open('credentials.json','w') as outfile:
          json.dump(creds_data,outfilE)

  return build(API_service_name,API_VERSION,credentials = credentials)

def execute_api_request(client_library_function,**kwargs):
  response = client_library_function(
    **kwargs
  ).execute()

  print(responsE)

if __name__ == '__main__':
  # Disable OAuthlib's https verification when running locally.
  # *DO NOT* leave this option enabled when running in production.
  os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'
  youtubeAnalytics = get_service()
  execute_api_request(
      youtubeAnalytics.reports().query,ids='chAnnel==UC0NM4tKT5s9szqnK3jP6dEw',startDate='2018-12-20',endDate='2018-12-30',metrics='views,likes,estimatedRevenue',dimensions='day',sort='day'
  )