Using token.pickle is quite frustrating, as every couple of weeks the token expires, and then I need to manually delete it from my source files in code, so it can regenerate itself, and then I need to re-authenticate it from my account.

Is there a way I can just create a new service without it? I know it's possible for Google sheets files. This is what that looks like:

def get_g_sheets_service():
 SERVICE_ACCOUNT_FILE = 'key.json'
 SCOPES = ['https://www.googleapis.com/auth/spreadsheets']

 creds = None
 creds = service_account.Credentials.from_service_account_file(
    SERVICE_ACCOUNT_FILE, scopes=SCOPES)

 SCOPES = ['https://www.googleapis.com/auth/spreadsheets']

 SAMPLE_SPREADSHEET_ID = 'ID_GOES_HERE'
 service = build('sheets', 'v4', credentials=creds)
 return service

but, the way to get a service for the calendar API looks like this:

import datetime
import pickle
import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/calendar']

CREDENTIALS_FILE = 'path_to_file/credentials.json'

def get_calendar_service():
   creds = None
   # The file token.pickle stores the user's access and refresh tokens, and is
   # created automatically when the authorization flow completes for the first
   # time.
   if os.path.exists('token.pickle'):
       with open('token.pickle', 'rb') as token:
           creds = pickle.load(token)
   # If there are no (valid) credentials available, let the user log in.
   if not creds or not creds.valid:
       if creds and creds.expired and creds.refresh_token:
           creds.refresh(Request())
       else:
           flow = InstalledAppFlow.from_client_secrets_file(
               CREDENTIALS_FILE, SCOPES)
           creds = flow.run_local_server(port=0)

       # Save the credentials for the next run
       with open('token.pickle', 'wb') as token:
           pickle.dump(creds, token)

   service = build('calendar', 'v3', credentials=creds)
   return service

Notice the token.pickle file?

How can I not deal with it?