"ResourceWarning: unclosed database..." with Python 3.13

[BookWorm0]

Python 3.13 is detecting unclosed database handles in tokencache.py. With PYTHONTRACEMALLOC=1, the errors are identified as being at lines 145 and 183.

I am unable to provide code for a working test case that doesn't doesn't expose my account's api_key and api_secret, but a quick look at tokencache.py shows that each call to sqlite3.connect() is missing a db.close(). When I manually insert the db.close() calls into my local copy of tokencache.py, the warning disappears.

I am not submitting a pull request because I cannot get the tox test framework to work locally, but I believe that there should be a db.close() after every db.commit() and after the call to curs.fetchone() on line 188.