Summary

StoredCredential file is not cleaned out by gradle

Sample Name

Google Calendar Quickstart

Expected Behavior

There should be a clean gradle command that really does clean, given that in the example atokens/StoredCredential file gets created when you first run the example.

Actual Behavior

The user is unaware of the fact that atokens/StoredCredential file gets dumped when running thecalendar/quickstart example the first time. The user takes care of thecredentials.json file as per instructions onthis page.
If after a while, the credentials expire (like in test mode, after 7 days, say) and the user then tries to rerun the example, even with a new, valid regeneratedcredentials.json the sample code will fail, leaving the user a bit puzzled. The user gets an error like:

> Task :run FAILEDException in thread "main" com.google.api.client.auth.oauth2.TokenResponseException: 400 Bad RequestPOST https://oauth2.googleapis.com/token{  "error": "invalid_grant",  "error_description": "Token has been expired or revoked."}

with little indication of why, because after getting new credentials, calls will still fail.
Adding a Gradle command like for examplegradle cleanStoredCredential and a good.gitignore file may help.

Specifications

• Java version (java -version) as specified in gradle
• OS (Mac/Linux/Windows) any