Get db name

hi sorry for english , there is a way to get db name ? 

i have this code to get db table :

Code:

           $db = \Config\Database::connect();

        $tableList = array();


        $query = $db->query("SHOW TABLES");
        $results = $query->getResult();

        foreach ($results as $row)
        {
           $tableList[] =$row->Tables_in_name_of_db;
        }

          $data['tableList']= $tableList;

Can i get the name to use in this method ? i know that db name are in .env but i want create a tool and i must get it