docs: def connect(self):
          """ Construct the psycopg2 connection instance
  
          :return: psycopg2.connect instance
          """
  
          if self._conn:
              return self._conn
  
          self._conn = psycopg2.connect(
              self.config,
              cursor_factory=psycopg2.extras.RealDictCursor,
          )
  
          self._conn.set_session(autocommit=True)
          psycopg2.extras.register_hstore(self._conn)
  
          return self._conn