Access Google API with Python SDK and refresh token

gdrive.py

# make sure your app is in published but not testing mode on Google Cloud Console
# refresh token will expire in 6 months then; see https://developers.google.com/identity/protocols/oauth2
# you can get a refresh token following this answer generated by Phind.com: https://www.phind.com/search?cache=esclzqazl0knyo8xouu0mf8c&source=sidebar
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import Resource, build
from google.auth.transport.requests import Request


class GoogleDriveAgent:
    def __init__(
        self, client_id: str, client_secret: str, token_uri: str, refresh_token: str, scopes: list[str]
    ):
        creds = Credentials(
            None,
            refresh_token=refresh_token,
            token_uri=token_uri,
            client_id=client_id,
            client_secret=client_secret,
            scopes=scopes,
        )
        creds.refresh(Request())
        self.service: Resource = build("drive", "v3", credentials=creds)

    def find_file(self, filename):
        """Search for a file in Google Drive."""
        results = (
            self.service.files()
            .list(q=f"name='{filename}' and trashed=false", fields="files(id, name)")
            .execute()
        )
        files = results.get("files", [])
        return files[0] if files else None