Hi there!
now i am trying to connect database but i what exact url to connect database because there is no link define in vagrant docs
The MySQL database is running on port 3306. You should be able to connect to the database via ‚192.168.33.10:3306‘ by providing your database credentials.
You can install adminer just like wontfix described in his post. The .htaccess only acts for the shopware-dev vhost. If you setup your own adminer apache vhost inside the vagrant box it should work.