-Force Logout
1. Navigate to the Drive or a Google Assignment
2. Have them visit this URL: https://lti-submission-google.app.schoology.com/authorize/logout
3. Have them navigate back to the assignment and reconnect their Google Drive account

-Revoke Access
1. In your Google account, click the grid in the upper-right.
2. Select My Account.
3. Under Sign In and Security, click Connected Apps and Sites.
4. Under Apps connected to your account, open Manage Apps.
5. Select Schoology.
6. Click Remove.
Now, go back to Schoology, and connect again:
1. Select a Google Assignment
2. Re-Authenticate