My token database grew to 37GB after I didn't catch the part in the guide about periodically running keystone-manage token_flush. So I have finally run keystone-manage token_flush now, and its been running for about 8 hours and it's still going. I'm wondering if there's a faster way to just completely purge the database by dropping the table and recreating it. What's the fastest way to do this and/or how do I properly recreate that table?