fix drive token generation and update readme

Signed-off-by: Shubham Gopale <shubham.gopale@gojek.com>

README.md

@@ -79,7 +79,7 @@ Note: You can limit maximum concurrent downloads by changing the value of MAX_CO
 - Visit the [Google Cloud Console](https://console.developers.google.com/apis/credentials)
 - Go to the OAuth Consent tab, fill it, and save.
 - Go to the Credentials tab and click Create Credentials -> OAuth Client ID
-- Choose Other and Create.
+- Choose `Desktop App` as Application type and Create.
 - Use the download button to download your credentials.
 - Move that file to the root of mirror-bot, and rename it to credentials.json
 - Visit [Google API page](https://console.developers.google.com/apis/library)

generate_drive_token.py

@@ -9,14 +9,18 @@
 if os.path.exists(__G_DRIVE_TOKEN_FILE):
     with open(__G_DRIVE_TOKEN_FILE, 'rb') as f:
         credentials = pickle.load(f)
-        if credentials is None or not credentials.valid:
-            if credentials and credentials.expired and credentials.refresh_token:
-                credentials.refresh(Request())
+        if (
+            (credentials is None or not credentials.valid)
+            and credentials
+            and credentials.expired
+            and credentials.refresh_token
+        ):
+            credentials.refresh(Request())
 else:
     flow = InstalledAppFlow.from_client_secrets_file(
         'credentials.json', __OAUTH_SCOPE)
-    credentials = flow.run_console(port=0)
+    credentials = flow.run_local_server(port=0)
 
 # Save the credentials for the next run
 with open(__G_DRIVE_TOKEN_FILE, 'wb') as token:
-    pickle.dump(credentials, token)
+    pickle.dump(credentials, token)