code: public function getDb($force = false)
      {
          if (is_null($this->db)) {
              
              $this->db = vDb::getInstance($this->credentials['host'], $this->credentials['user'], $this->credentials['password'], $this->credentials['database']);
          }
          
          return $this->db;
      }
docs: (non-PHPdoc)
  @see \JaegerApp\Db\DbInterface::getDb()