DefaultCredentialsError: Your default credentials were not found. To set up Application Default Credentials

[mannaaaz]

Summary

I went through all these steps here: [https://developers.google.com/drive/api/quickstart/python#authorize_credentials_for_a_desktop_application] and downloaded, renamed the credentials.json. The reason why I am doing this because I want to load some of my google drive folders into LangChain to build a chatbot. Anyways, when i write this code:

loader = GoogleDriveLoader(
    folder_id="1JPOaEJdy-LiiqBAZpRQ4FH0ssSFuy7i3",
    #token_path="/Users/mannaz/Desktop/PsychedelicTest/psychedelicProject/google_token.json",
    # Optional: configure whether to recursively fetch files from subfolders. Defaults to False.
    recursive=False,
)
#%%
docs = loader.load()

` ` `  
I get an error: 

DefaultCredentialsError: Your default credentials were not found. To set up Application Default Credentials, see https://cloud.google.com/docs/authentication/external/set-up-adc for more information.

What could be the reasons? I followed the steps exactly. And before that I was getting the error: quickstart.py fails on error: No such file or directory: 'credentials.json'  and now this. 

[mannaaaz]

when i added this cell before:

import os os.environ["GOOGLE_APPLICATION_CREDENTIALS"] ="/Users/mannaz/Desktop/PsychedelicTest/psychedelicProject/credentials.json"

it gives me this error: FileNotFoundError: [Errno 2] No such file or directory: '/Users/mannaz/.credentials/credentials.json'