@fixture<EOL>def post_token_dropbox(dropbox_container, config, post_token):
from briefkasten import parse_post_token<EOL>return dropbox_container.get_dropbox(<EOL>parse_post_token(<EOL>post_token,<EOL>secret=config.registry.settings['<STR_LIT>']<EOL>)<EOL>)<EOL>
returns a dropbox instance matching the given post_token