chore: Migrate to google-auth (oauth2client is deprecated), closes #60

https://google-auth.readthedocs.io/en/latest/reference/google.auth.html#google.auth.default

Note: pydrive2 still uses oauth2client: iterative/PyDrive2#89

ocdskingfishercolab/__init__.py

@@ -5,6 +5,7 @@
 from urllib.parse import urljoin
 
 import flattentool
+import google.auth
 import gspread
 import requests
 import sql
@@ -18,6 +19,7 @@
 
     files = Mock()
     files.download.return_value = None
+
 from gspread_dataframe import set_with_dataframe
 from IPython import get_ipython
 from IPython.display import HTML
@@ -66,7 +68,8 @@ def authenticate_gspread():
     :rtype: gspread.Client
     """
     auth.authenticate_user()
-    return gspread.authorize(GoogleCredentials.get_application_default())
+    credentials, _ = google.auth.default()
+    return gspread.authorize(credentials)
 
 
 def authenticate_pydrive():

setup.py

@@ -18,6 +18,7 @@
     # list a set of requirements that pip can resolve in both environments.
     install_requires=[
         'flattentool',
+        'google-auth',
         'gspread',
         'gspread-dataframe',
         'ipython',